Annotations for Day of Doom


Baker & Taylor
After delivering the last ransom, Amy and Dan discover that Vesper One has a terrifying plot and they race against time to stop him from harming millions of innocent people.

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Baker & Taylor
The best-selling series returns with an even deadlier challenge as Amy and Dan's race to save the hostages reaches its thrilling conclusion as a new enemy is revealed to be searching for The 39 Clues. Final episode written by an internationally acclaimed, best-selling author. Simultaneous.

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Scholastic
The Ultimate Sacrifice

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.


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