International bestseller David Baldacci pens the stunning conclusion to Cahills vs. Vespers! It started with a kidnapping. A shadowy organization known only as the Vespers snatched seven members of the Cahill family and demanded a series of bizarre ransoms from around the world. Thirteen-year-old Dan Cahill and his older sister, Amy, began a global treasure hunt, determined to bring back whatever Vesper One needed, so long as it kept the hostages safe.But when they deliver the last ransom, Amy and Dan discover Vesper One's terrifying endgame. The objects he demanded are vital pieces in a Vesper plot that will harm millions of innocent people. Now the two siblings and their friends are in an all-out sprint to stop Vesper One . . . before the whole world goes BOOM.

KNOW THE TRUTH You are a member of the Cahill family, the most powerful family the world has ever known. The source of the family's power has been lost, hidden around the world in the form of 39 clues. Your Mission: Be the first to find the clues. This handbook has everything you need on the hunt: Get never-seen-before intel about the Cahill branches. Discover insider information about key players, including the Kabras. Track branch strongholds on your own Agent Map. Protect your secrets with 18 pages of codes. Forge documents to confuse rival clue hunters. Good luck on the hunt. You're going to need it.

A guide to the characters and situations in "The 39 Clues" outlines the Cahills' secrets, including hidden facts, strategies, agents, lost founders, secret bases, and scandals, as well as information about all branches of the family.

ATTENTION! Amy and Dan Cahill have been located once again, this time in the company of the notoriously unreliable Alistair Oh. Could they have been foolish enough to make an alliance? Spies report that Amy and Dan seem to be tracking the life of one of the most powerful fighters the world has ever known. If this fearsome warrior was a Cahill, his secrets are sure to be well-guarded . . . and the price to uncover them just might be lethal.

A brand new adventure from the world of The 39 Clues!For 500 years, the Cahills have been the most powerful family in the world. For 500 years, they've protected the source of their power - the 39 Clues. And for 500 years, they've kept their secrets silent. Until now.This extraordinary stand-alone novel cracks open the Cahill vault to tell the story of the most coveted piece of artwork in the world, a masterpiece that has been the target of seven separate theft attempts: Jan van Eyck’s altarpiece at Ghent. OPERATION TRINITY chronicles the first Vesper attack on the altarpiece in the 1600s, then jumps to WWII and young Grace Cahill’s desperate bid to save the masterwork from the Nazis. The final piece of the novel tells the story of Ian and Natalie Kabra’s first solo operation and features an 11th hour appearance by Grace Cahill on her final mission.History will never be the same.

Three amazing adventure stories from the Cahill vault! Read at your own risk. In 1814, redcoats burned the White House to the ground. In 1889, Harry Houdini discovered a trick that would save his life. In 1955, the U.S. launched the world's first nuclear submarine. And one family pulled the strings behind the scenes at each of these events: the Cahills -- the most powerful family the world has ever known.Now the Cahills have opened their vault and dangerous secrets are pouring out. This volume contains three stories previously published as ebook adventures, THE REDCOAT CHASE, THE SUBMARINE JOB, and THE HOUDINI ESCAPE, three stories that will change history as we know it forever. Flee alongside a young Cahill as Washington burns, unlock Houdini's magic, and stow away with young Fiske Cahill on a desperate mission that could cost him his life.Venture into the vault if you dare. But don't say we didn't warn you.