As they continue their search for the 39 Clues in China, fourteen-year-old Amy is faced with a terrible dilemma when her eleven-year-old brother Dan suddenly disappears--keep on searching for the next Clue or try to find her brother.

Twelve-year-old Trevor Firestone loves playing war-based video games and he idolizes his great-grandfather Jacob who came home from World War II a celebrated hero; now ninety-three Jacob wants to retrace his journey in memory and reality and return to the small French village that his unit liberated, and Trevor is going with him--but not everyone in the town want Jacob to come, and Trevor is going to learn an important lesson: real war is not a video...

Twelve-year-old Cooper Vega and his military family has moved so often that he is used to new schoolmates not knowing his name, but at the moment he has a bigger problem--his new phone is haunted by the ghost of Roderick Northrop, a boy from the sixteenth-century, who needs his help to finish a quest, which is somehow tied up in the Stratford Middle School production of Romeo and Juliet.

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. "La carrera contrarreloj para encontrar las 39 pistas ha empezado, y los hermanos huérfanos Amy y Dan Cahill no pueden creer que estén a la cabeza de la búsqueda, que los lleva a Viena y Venecia. Pero, ¿lograrán...