Aiden works with the FBI in order to rescue his sister Meg, who was kidnapped. Where is Meg Falconer? Everybody wants to know. Her brother Aiden, who saw her kidnapped and is now trying to track her down, wants to know. The FBI, led by the very serious Agent Harris, wants to know. Her parents, who fear their pasts have something to do with why Meg was taken, want to know. Even Meg's kidnappers want to know. Because even though they caught her once,...

Thirteen-year-old Dan Cahill and his older sister, Amy, thought the search for the thirty-nine clues leading to the source of their family's power was over, but when Cahills are kidnapped by the Vespers, Amy and Dan find themselves with only a few day to fulfill a bizarre ransom request before their friends start dying.

A million dollars, or a clue? Police report a break-in at an elite hotel, and the suspects sound suspiciously like Amy and Dan. There's a car and speedboat chase and an angry mob! When there's a clue on the line, anything can happen.