Day of Doom (The 39 Clues: Cahills vs. Vespers, Book 6)

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.

The 39 Clues remains...-A NEW YORK TIMES Bestselling Children's Book Series-A USA TODAY Bestseller-A WALL STREET JOURNAL Bestseller-A PUBLISHERS WEEKLY Bestseller-An INDIE BOUND Bestseller

David Baldacci is a global #1 bestselling author. His books are published in over 45 languages and in more than 80 countries; over 110 million copies are in print. His works have been adapted for both feature film and television. He is also the cofounder, along with his wife, of the Wish You Well Foundation, which supports literacy efforts across America. David and his family live in Virginia.

Now was not the time for Amy Cahill's courage to fail. She had to keep her wits about her. Amy knew she would have to be wary of poisons, a stable of the Lucian branch. Isabel might have a hidden needle in a ring, or perhaps embedded in her shoe. Whatever the case, Amy would be ready. This was one on one. And she was going to take Isabel down, finally. She balled up her courage and prepared to face one of her worse nightmaes, Isabel Kabra.