Detective Isaac Bell battles foreign spies, German U-boats, and an old nemesis to capture a secret technology that could alter the outcome of World War I in the latest adventure in the #1 New York Times bestselling series from Clive Cussler.

As New England swelters in the summer of 1914, Detective Isaac Bell is asked to investigate the disappearance of a cache of rifles—only to discover something much more sinister. Whoever broke into this Winchester Factory wasn’t looking to take weapons, they wanted to leave something in the shipping crates: a radio transmitter, set to summon a fleet of dreaded German U-boats. Someone is trying to keep American supplies from reaching British shores, and if Bell doesn’t crack the conspiracy in time, the Atlantic Ocean will run red with blood.

Bell must hunt down a new piece of technology that is allowing the Germans to rule the seas from New York to England. With the outcome of the war at stake and Franklin Roosevelt’s orders on the line, Bell will risk everything to stop the U-Boats before they strike again.

What was Amelia Earhart carrying on her final flight? The adventure begins two thousand feet beneath the surface of the Earth.

Philip Mercer, a preeminent geologist with a taste for international intrigue and danger, rides an elevator two thousand feet into the earth at the Leister Deep Mine in Minnesota. Mercer is there to visit his old friend and mentor, Abraham Jacobs, who is leading a research team to the deepest section of the mine for a groundbreaking study on climate change. But as Mercer approaches, he is stunned to hear automatic gunfire in the massive underground chambers. By the time he finds his way to them, Abe Jacobs and the entire research team have been brutally attacked—and Mercer is left seeking not only answers but revenge.
     Mercer immediately retraces Jacobs’s tracks, searching for clues to the secret project on which the distinguished scientist was working. Staying one step ahead of a highly trained team of assassins, Mercer follows a trail that leads from a harrowing close call in the Midwest to a nail-biting showdown in the rugged mountains of Afghanistan to a remote island in the middle of the Pacific. At stake is an extraordinary scientific discovery that could irrevocably alter the planet, centered on a cache of rare crystals called lightning stones—rumored to have been aboard Amelia Earhart’s plane when it vanished on July 2, 1937.
     With his trademark combination of intellectual swagger, riveting action, and cutting-edge science, internationally bestselling author Jack Du Brul has crafted a superbly entertaining novel that will thrill his fans.

Beneath the Pacific Ocean, a volcano surges upward, carrying in its fiery heart a mineral more powerful than uranium. When the volcano breaks the ocean’s surface, America and other nations will battle to control what is known as Vulcan’s Forge, a source of limitless, clean, nuclear power.

The secret of Vulcan’s Forge begins to unravel when Mercer, a man of many talents now working for the United States Geologic Survey, learns that the daughter of an old friend is in danger. Saving her takes Mercer from the Oval Office to a secret submarine off Hawaii. On the islands, the secession movement, controlled by a megalomaniac Japanese multimillionaire, has turned violent, and the United States trembles on the brink of civil war.