Thirteen-year-old Dan Cahill and his sister Amy thought they'd finally won the hunt for the source of their family's power. But soon they find themselves embarking on a brand new adventure.

When seven members of his family were kidnapped by the Vespers, thirteen-year-old Dan Cahill knew he was in for the fight of his life. He knew he was up against an impossibly powerful enemy. And Dan knew the odds were that some of his family members wouldn't make it. But even as Dan steels himself to accept these facts, the unthinkable happens. The Vespers capture a blameless bystander -- Dan's best friend Atticus. With an innocent life on the line,...

When seven members of their family were kidnapped, thirteen-year-old Dan Cahill and his older sister, Amy, got ready for the fight of their lives. But their enemy, a terrifying group known as the Vespers, remained frustratingly elusive. They stay in the shadows, picking off Cahills one by one.And now the Vespers have landed their most serious blow yet - a blow that strikes at the very heart of the Cahill family. Because Amy and Dan discover that there's...

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...

NARRATOR: David PittuFORMAT: UnabridgedThe Clue hunt is over, but Amy and Dan Cahill's lives haven't exactly returned to normal. They know that the Cahills' historic rivals-the Vespers-have been waiting for the opportunity to strike. As the new Madrigal leaders, it's up to Amy and Dan to prepare the Cahills for attack, but their efforts aren't enough to stop the Vespers, a mysterious organization that includes some of the world's most dangerous

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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....