In the seventh novel in New York Times bestselling Stuart Gibbs’s FunJungle series, Teddy Fitzroy returns as FunJungle’s resident sleuth to solve the disappearances of endangered bison and an irreplaceable necklace.

Teddy Fitzroy, his family, and some other FunJungle employees have been invited to visit a bison ranch just outside Yellowstone National Park that FunJungle’s owner, J.J. McCracken, is considering purchasing. But as usual, trouble isn’t far behind.

The ranch’s endangered bison have been mysteriously disappearing. Then a massive local grizzly bear named Sasquatch breaks into the house, causing chaos. In the aftermath, Kandace McCracken discovers that her exceptionally expensive sapphire necklace has vanished.

Was it stolen? Or did Sasquatch eat it? (And if so, can it be recovered?) And what’s been happening to the bison?

With over a dozen suspects, it’s up to Teddy to detangle this hairy situation, before his family or friends–or any more expensive objects–become dinner.

Twelve-year-old Theodore “Teddy” Roosevelt Fitzroy has murder on his hands and trouble on his tail. He believes that Henry, the hippopotamus at the brand-new FunJungle, has been murdered. The zoo’s top brass claim the hippo went belly up the natural way, but Teddy and his feisty friend Summer McCraken have other ideas. Could the culprit be FunJungle’s animal-hating head of operations? Or is it FunJungle’s owner–Summer’s dad–a man who is much more concerned about money than animal welfare? The deeper Teddy and Summer dig, the more danger they’re in–because when it comes to hippo homicide, the truth can’t be caged!

Teddy Fitzroy returns as FunJungle’s resident zoo sleuth when a rhinoceros is at risk in Big Game, a follow-up to Belly Up and Poached–which Kirkus Reviews called a “thrill-ride of a mystery.”

When someone takes aim at Rhonda Rhino, FunJungle’s pregnant (and endangered) Asian greater one-horned rhinoceros, the zoo steps up security measures in order to protect this rare animal and her baby.

But the extra security isn’t enough–someone is still getting too close for comfort. Teddy and company start to suspect that whoever is after Rhonda is really after her horn, which is worth a lot of money on the black market.

For the first time ever, the head of the zoo enlists Teddy for help–for once, he doesn’t have to sneak around in order to investigate–and the results are even more wacky, and even more dangerous, than ever before.

In this third book in the Charlie Thorne series from bestselling author Stuart Gibbs, Charlie tracks down Cleopatra’s greatest treasure in Egypt.

Charlie Thorne is a genius. Charlie Thorne is a renegade. Charlie Thorne isn’t going down without a fight.

After tracking down incredible discoveries by Einstein and Darwin, Charlie is back. This time, the great ruler Cleopatra has left behind an extremely valuable and powerful treasure, its location encoded on an ancient stone tablet.

In 30 BCE, Cleopatra and her husband, Marc Antony, lost their war against Octavian for control of the Egyptian Empire. However, Cleopatra knew Octavian was really after the mysterious item that was the source of all her wealth and influence, so she hid it before dying by suicide. She left a series of devious clues behind for her children to find it, but they were lost to history…until now.

In a breathless adventure that takes her across the globe, Charlie must fight for her life against ruthless enemies, match wits with Cleopatra, and solve the two-thousand-year-old mystery to prevent the most powerful treasure of the ancient world from falling into the wrong hands.

“Fast-paced, smart, and action-packed…a real page-burner.” –Chris Grabenstein, #1 New York Times bestselling author of the Mr. Lemoncello’s Library series

From New York Times bestselling author Stuart Gibbs comes the first novel in a thrilling new series about the world’s youngest and smartest genius who’s forced to use her unbelievable code-breaking skills to outsmart Einstein.

Charlie Thorne is a genius.
Charlie Thorne is a thief.
Charlie Thorne isn’t old enough to drive.

And now it’s up to her to save the world…

Decades ago, Albert Einstein devised an equation that could benefit all life on earth–or destroy it. Fearing what would happen if the equation fell into the wrong hands, he hid it.

But now, a diabolical group known as the Furies are closing in on its location. In desperation, a team of CIA agents drags Charlie into the hunt, needing her brilliance to find it first–even though this means placing her life in grave danger.

In a breakneck adventure that spans the globe, Charlie must crack a complex code created by Einstein himself, struggle to survive in a world where no one can be trusted, and fight to keep the last equation safe once and for all.

In this sequel to the New York Times bestselling Charlie Thorne and the Last Equation–which #1 New York Times bestselling author Chris Grabenstein called “a real page-burner”–Charlie searches for Charles Darwin’s hidden treasure in South America.

Charlie Thorne is a genius. Charlie Thorne is a fugitive. Charlie Thorne isn’t even thirteen.

After saving the world, Charlie is ready to take it easy in the Galapagos Islands. That is, until she’s approached by the mysterious Esmeralda Castle, who has a code she knows only Charlie can decipher. In 1835, Charles Darwin diverted his ship’s journey so he could spend ten months in South America on a secret solo expedition. When he returned, he carried a treasure that inspired both awe and terror in his crew. Afterward, it vanished, never to be seen again…

But Darwin left a trail of clues behind for those brave and clever enough to search for it. Enter Charlie Thorne. In a daring adventure that takes her across South America, Charlie must crack Darwin’s 200-year-old clues to track down his mysterious discovery–and stay ahead of the formidable lineup of enemies who are hot on her tail.

When an ancient hidden treasure is at stake, people will do anything to find it first. Charlie may be a genius, but is she smart enough to know who she can trust?

In the third book in the New York Times bestselling Spy School series, Ben gets kicked out of the CIA’s spy school and enrolls with the enemy.

During a spy school game of Capture the Flag, twelve-year-old Ben Ripley accidentally shoots a live mortar into the principal’s office–and immediately gets himself expelled. Not long after going back to the boring real world, Ben gets an offer to join evil crime organization SPYDER. And he accepts.

Ben can tell he’s a key part of their sinister plan, but he’s not quite sure what the plan is. Can Ben figure out what SPYDER is up to–and get word to the good guys without getting caught–before it’s too late?

Teddy Fitzroy returns as FunJungle’s resident sleuth when a lion is falsely accused of killing a distinguished dog in the latest novel in New York Times bestselling author Stuart Gibbs’s FunJungle series.

For once, operations at the enormous zoo/theme park appear to be running smoothly (except for the occasional herring-related mishap in the penguin exhibit) and Teddy Fitzroy is finally able to give detective work a rest. But then a local lion is accused of killing a famous dog–and the dog’s owner, an inflammatory radio host, goes on a crusade to have the cat declared a nuisance so it can be hunted. But it looks like the lion might have been framed, and a renegade animal activist wants Teddy and Summer to help prove it. Soon, Teddy finds himself wrapped up in the middle of his most bizarre, hilarious, and dangerous case yet.

Join New York Times bestselling author Stuart Gibbs in this first book in a hilarious new middle grade series about a peasant boy who wants to be a knight. Presented on audio by an ensemble cast, with music and sound effects.

Tim is just a peasant, but he dreams big. He wants more out of life than to grow up to be a woodsman like his father. Unfortunately, the only route to success in the kingdom of Wyld is to be born a prince. Still, Tim is determined. He is brave and clever and always tries to do the right thing–even though he rarely gets the credit for it.

Then news spreads that Princess Grace of the neighboring kingdom has been abducted by the evil Stinx and Prince Ruprecht needs a legion of knights to join him on his quest to rescue her. Tim finally has the lucky break he’s been waiting for, the opportunity to change his station in life. And even though he doesn’t know how to ride a horse or wield anything more deadly than a water bucket, he’s going to do whatever it takes to make sure his dream becomes a reality.

New York Times bestselling author

Teddy Fitzroy returns as FunJungle’s resident sleuth when the zoo’s newest addition goes missing–before she even arrives!–in the latest novel in New York Times bestselling author Stuart Gibbs’s FunJungle series.

FunJungle is frenzied, awaiting the arrival of its most thrilling animal yet–Li Ping–a rare and very expensive giant panda that the zoo went to enormous lengths to secure. But when the truck transporting Li Ping shows up, its precious cargo has vanished into thin air. The FBI steps in to investigate, and Teddy is happy to leave the job in their (supposedly) capable hands. After all, FunJungle has never encountered a crime this serious.

But when someone threatens to blackmail Teddy’s girlfriend, Summer, if he doesn’t solve the crime, his involvement in this mystery is no longer black and white.

Teddy Fitzroy’s back for another zoo mystery–this time it’s a koala caper–in this action-packed follow-up to Belly Up that School Library Journal called a “whopper of a whodunit that delivers plenty of suspects, action, slapstick, gross bodily functions, red herrings, and animal trivia.”

School troublemaker Vance Jessup thinks Teddy Fitzroy’s home at FunJungle, a state-of-the-art zoo and theme park, is the perfect place for a cruel prank. Vance bullies Teddy into his scheme, but the plan goes terribly awry.

Teddy sneaks into the koala exhibit to hide out until the chaos dies down. But when the koala goes missing, Teddy is the only person caught on camera entering and exiting the exhibit.

Teddy didn’t commit the crime–but if he can’t find the real culprit, he’ll be sent to juvie as a convicted koala-napper.

It’s a murder mystery on the moon in this humorous and suspenseful space adventure from the author of Belly Up and Spy School that The New York Times Book Review called “a delightful and brilliantly constructed middle grade thriller.”

Like his fellow lunarnauts–otherwise known as Moonies–living on Moon Base Alpha, twelve-year-old Dashiell Gibson is famous the world over for being one of the first humans to live on the moon.

And he’s bored out of his mind. Kids aren’t allowed on the lunar surface, meaning they’re trapped inside the tiny moon base with next to nothing to occupy their time–and the only other kid Dash’s age spends all his time hooked into virtual reality games.

Then Moon Base Alpha’s top scientist turns up dead. Dash senses there’s foul play afoot, but no one believes him. Everyone agrees Dr. Holtz went onto the lunar surface without his helmet properly affixed, simple as that. But Dr. Holtz was on the verge of an important new discovery, Dash finds out, and it’s a secret that could change everything for the Moonies–a secret someone just might kill to keep…

In this New York Times bestselling novel the moon base commander has gone missing and Dash Gibson is on the case. The second mind-boggling mystery of the Moon Base Alpha series from beloved author Stuart Gibbs.

There’s nowhere to hide on the world’s first moon base. After all, it’s only the size of a soccer field. So when Nina Stack, the commander of Moon Base Alpha, mysteriously vanishes, the Moonies are at a total loss.

Though he may be just twelve years old, Dashiell Gibson is the best detective they’ve got. But this confusing mystery pushes Dash to his limits. Especially since Dash accidentally made contact with an alien and has to keep it a secret. With the fate of the entire human race hanging in the balance, will Dash be able to solve the mystery of the missing Moonie?

In the second book in the New York Times bestselling Spy School series, top-secret training continues into summer for aspiring spy Ben Ripley–and so does the danger.

Ben Ripley is a middle schooler whose school is not exactly average–he’s spent the last year training to be a top-level spy and dodging all sorts of associated danger. So now that summer’s finally here, Ben would like to have some fun and relax. But that’s not going to happen during required spy survival training at a rustic wilderness camp, where SPYDER, an enemy spy organization, has infiltrated the spies’ ranks. Can Ben root out the enemy before it takes him out–for good?

“Combines Alex Rider’s espionage skills with a huge dose of the sarcasm of Artemis Fowl.” —School Library Journal

Can an undercover nerd become a superstar agent? In the first book in the New York Times bestselling Spy School series, Ben Ripley sure hopes so–and his life may depend on it!

Ben Ripley may only be in middle school, but he’s already pegged his dream job: CIA or bust. Unfortunately for him, his personality doesn’t exactly scream “secret agent.” In fact, Ben is so awkward, he can barely get to school and back without a mishap. Because of his innate nerdiness, Ben is not surprised when he is recruited for a magnet school with a focus on science–but he’s entirely shocked to discover that the school is actually a front for a junior CIA academy. Could the CIA really want him?

In the ninth addition to the New York Times bestselling Spy School series, Ben Ripley faces his nemesis, Murray Hill, on the high seas.

Thanks to the evidence Ben uncovered in his investigation of the Croatoan, the CIA has tracked his nemesis, Murray Hill, to Central America, where they believe he is boarding the world’s biggest cruise ship, The Emperor of the Seas, on its maiden voyage around the world.

His mission: Pose as part of a family, with Alexander and Catherine Hale as his parents, Erica as his sister, and his best friend Mike as his brother, to find out what Murray is plotting.

At first, it sounds exciting to have a mission on the most glamorous ocean liner on earth, but as usual, nothing goes according to plan. There is action, danger, and plenty of surprises as Ben and his team quickly find themselves in hot water.

In the seventh book in the New York Times bestselling Spy School series, Ben Ripley is finally going to take SPYDER down, once and for all.

Stranded in Mexico after nearly capturing the leaders of SPYDER, thirteen-year-old Ben Ripley desperately needs a shower. But even more so, he and his spy school friends need to come up with a new plan to defeat their enemies; their only clue a key that opens…something.

The mission: Go rogue from the CIA, join up with the British MI6 to locate the leader of SPYDER, the enigmatic Mr. E, and bring down the evil organization once and for all.

Only it won’t be easy. They’ll have to deal with rival evil splinter factions, devious double-crosses, and learning to drive on the opposite side of the road. But they have no other choice: this is their last chance to crack the code on SPYDER.

In the sixth book in the New York Times bestselling Spy School series, Ben is taken to Mexico by his nemesis in the hopes that he’ll finally be able to take down SPYDER.

Thirteen-year-old Ben Ripley has been caught in the snares of SPYDER more than once and knows well enough to be suspicious of anything that seems too good to be true–despite needing special tutoring in advanced survival techniques. So when Murray Hill finally breaks his silence with an offer to hand over the SPYDER elite, Ben knows that there must be something going on. But his hesitation doesn’t stop the assignment.

The mission: Follow Murray Hill to an undisclosed location with no one else but Erica Hale to identify SPYDER leadership.

However, as Ben suspected, nothing goes as planned, and what should be an easy mission quickly turns deadly. Ben and Erica will have to face rogue agents, trained killers, and even very hungry crocodiles in a race against the clock to find out what SPYDER is up to this time–and thwart their evil plans.

In the tenth book in the New York Times bestselling Spy School series, Ben Ripley races against time and across state lines–by car, train, boat, and plane–to avoid his new cyber enemies and track down Murray Hill.

Ben Ripley’s longtime nemesis, Murray Hill, has put a price on Ben’s head and accused him of being at the center of a conspiracy on the internet. Now Ben finds himself in his greatest danger yet, on the run from both assassins and conspiracy theorists.

Ben must find Murray before his machinations catch up to Ben–but with so much at stake, even some of Ben’s most trusted friends might not be at the top of their game, leaving Ben to be tested like never before.

In the eighth book in the New York Times bestselling Spy School series, Ben Ripley faces the Croatoan–a new evil organization that’s so mysterious, the only proof it exists is from the American Revolution.

With SPYDER defeated, Ben Ripley is looking forward to his life getting back to normal, or as normal as possible when you’re a superspy in training. Until someone bombs the CIA conference room next door. To Ben’s astonishment, the attacker is none other than Erica Hale, the spy-in-training he respects more than any other.

His mission: prove Erica is not a double agent working against the US, locate the fabled colonial-era insurgent group that’s blackmailing her, figure out what their devious plot is, and thwart it.

But this time, Ben finds himself up against opponents he has never encountered before: his own friends. How can he succeed when he doesn’t even know who he can trust?

In the fifth book in the New York Times bestselling Spy School series, Ben goes undercover in the White House to take on a SPYDER operative determined to assassinate the president.

Thirteen-year-old Ben Ripley has had a lot of field success despite only just beginning his second year at Spy School, something even graduates rarely experience. But he’d never have survived without the help from experienced agents and his friends. Now he’s been called in on a solo mission–and the fate of the United States of America is on his shoulders alone.

The mission: Prevent a presidential assassination by infiltrating the White House and locating the enemy operative.

And when everything goes wrong, Ben must rely on his spy school friends to save his reputation…but even friends can double-cross or be swayed to the enemy’s side.

In the fourth book in the New York Times bestselling Spy School series, Ben Ripley enrolls in ski school, where the slopes, and the stakes, get really steep.

Thirteen-year-old Ben Ripley is not exactly the best student spy school has ever seen–he keeps flunking Advanced Self Preservation. But outside of class, Ben is pretty great at staying alive. His enemies have kidnapped him, shot at him, locked him in a room with a ticking time bomb, and even tried to blow him up with missiles. And he’s survived every time. After all that unexpected success, the CIA has decided to activate Ben for real.

The Mission: Become friends with Jessica Shang, the daughter of a suspected Chinese crime boss, and find out all of her father’s secrets.

Ben might not be able to handle a weapon (or a pair of skis), but he can make friends easy-peasy. That is, until his best friend from home drops in on the trip and jeopardizes the entire mission…

The first book in the thrilling time travel adventure trilogy from New York Times bestselling Spy School author Stuart Gibbs–now with a brand-new look!

Before they were legends, they were friends. All for one and one for all!

On a family trip to Paris, Greg Rich’s parents disappear. They’re not just missing from the city–they’re missing from the century. So, Greg does what any other fourteen-year-old would do: He travels through time to rescue them.

Greg soon finds out that his family history is tied to the legendary Three Musketeers. But when he meets them, they’re his age, and they’ll only live long enough to become true heroes if he can save them.

To rescue his parents, Greg must assume the identity of a young Musketeer in training and unite Athos, Porthos, and Aramis–but a powerful enemy is doing everything possible to stop him.

And don’t miss Traitor’s Chase and Double Cross, the next two books in Stuart Gibbs’s thrilling Last Musketeer trilogy!

Loyalty is tested in this second book in the thrilling time travel adventure trilogy from New York Times bestselling Spy School author Stuart Gibbs.

Having assumed the identity of a young D’Artagnan, Greg Rich is beginning to get the hang of things in 1615 Paris. But he hasn’t figured out how to get home yet. Or how to defeat the dangerous Michel Dinicoeur, who has made it his mission to destroy Greg, Athos, Aramis, and Porthos.

When Dinicoeur escapes the Bastille and flees to Spain, the Musketeers charge after him, only to be ambushed. Someone is anticipating their every move. Could there be a traitor in their midst? If the Musketeers can’t trust each other, who can they trust? It’s “all for one and one for all” . . . isn’t it?

And don’t miss the action-packed finale, The Last Musketeer #3: Double Cross.

The past, present, and future are all at stake in this final book in the thrilling time travel adventure trilogy from New York Times bestselling author Stuart Gibbs.

Greg Rich should feel invincible. After all, he’s traveled through time, become one of the legendary Musketeers, and–most recently–prevented the Spanish army from attacking Paris.

Instead, he and his friends are languishing in prison, having fallen into a trap set by Milady and the Prince of Conde. But Greg didn’t come to the seventeenth century to sit in a jail cell and await execution.

He, Aramis, Athos, and Porthos need to get to King Louis, who is in immediate danger of being overthrown by the scheming prince. To save the king and history itself, the boys must break out of prison, defend Louis, and return Greg and his parents to the twenty-first century before it’s too late.

Don’t miss the thrilling Last Musketeer trilogy from Spy School author Stuart Gibbs!

Join Tim and his friends on a treacherous journey across the seas in the laugh-out-loud funny, highly illustrated third book of the New York Times bestselling Once Upon a Tim series from Spy School author Stuart Gibbs.

After helping Princess Grace foil the villainous Prince Ruprecht—twice!—junior knights Tim, Belinda, and Ferkle are on a new quest—this time to recover the Queen of Merryland’s precious golden fleece (and more importantly, the protective amulet in its pocket) from the Kingdom of Dinkum. The safety of all Merryland depends upon them.

But first, they must face the deadly Sea of Terror and the dastardly perils it contains. Tim and his friends will have to use every ounce of bravery, valor, and intelligence they possess to navigate the treacherous waters—or else risk becoming flotsam on the waves.

In the latest novel in New York Times bestselling author Stuart Gibbs’s FunJungle series, Teddy Fitzroy returns as FunJungle’s resident sleuth to solve his most improbable mystery yet–with a victim that’s 65 million years old.

Teddy was all set for a campout at his friend Sage’s family ranch–but then Sage gets terrible news: The skull of a rare dinosaur that was being excavated on his property has mysteriously vanished overnight in the middle of a rainstorm, even though it weighed 500 pounds. Not a single footprint has been left behind. Since the dinosaur was top secret, the police don’t believe anyone outside the dig could have stolen it.

A T-rex skull can sell for millions of dollars, and everyone is a suspect–including J.J. McCracken, the owner of FunJungle.

Meanwhile, Teddy’s old foes, the Barksdale twins, have gotten into trouble with an illegally purchased anaconda, and Teddy’s girlfriend Summer wants to find out who’s behind the local trade in black market reptiles. The two cases will drag Teddy into more danger and chaos than ever before, in this mystery that’s stranger than fiction.

A New York Times bestselling series.

Tensions are running high when multi-billionaire Lars Sjoburg is poisoned and everyone is looking to Dash Gibson to solve the case in this third and final book in the New York Times bestselling Moon Base Alpha series.

Moon Base Alpha was supposed to be an exciting place to live, but Dashiell Gibson didn’t expect for it to be this exciting. He’s already had to solve a murder and locate a missing moon base commander. Now, he just wants to have a calm, quiet thirteenth birthday. But, of course, trillionaire (and total pain) Lars Sjoburg ruins it–by being poisoned.

Now there’s another potential killer loose on Moon Base Alpha, and Dash is forced to identify the most likely suspects. Suddenly Dash finds himself with a target on his back. Whoever poisoned Lars will stop at nothing to keep his–or her–identity a secret.

In the eighth novel in New York Times bestselling Stuart Gibbs’s FunJungle series, Teddy Fitzroy returns as FunJungle’s resident sleuth to find the culprits behind a blown-up whale and a string of beach sand thefts.

After an escaped kangaroo starts a fire that burns down his house, Teddy Fitzroy accepts an invitation to go to Malibu with his girlfriend, Summer, and her mother, Kandace. He’s hoping to spend some time relaxing on the beach, but wherever Teddy goes, trouble isn’t far behind.

First, a massive dead whale has washed up on the beach—and before anyone can determine what killed it, it explodes. Doc, the head vet from FunJungle, suspects something fishy is going on and ropes Teddy and Summer into helping him investigate.

Then, Teddy stumbles upon yet another mystery involving tons of stolen sand. And the paparazzi start spreading rumors about Summer dating a celebrity, leading Teddy to question their relationship.

Without Summer as his trusted partner, can Teddy navigate the rough waters of this glitzy world and uncover what’s going on?