Amy and Dan Cahill have their final confrontation with twisted billionaire J. Rutherford Pierce, a man whose power has no limits and is one step away from being elected president.

Amy and Dan cross the oceans on the trail of a famous aviator, but they find more than they're looking for. Their enemies are becoming more vicious, and the truths they discover more crushing than ever.

Thirteen-year-old Dan Cahill and his older sister, Amy, are the latest guardians of the Clues -- thirty-nine ingredients in a serum that transforms whomever takes it into the most powerful person on earth. They think they've done everything right, but a tiny mistake leads to catastrophe. The serum is missing and Dan and Amy have to get it back and stop who stole it ... before it's game over.

Because John is afraid to leave the Navajo Reservation, his grandfather explains to him how the Navajo language, faith, and ingenuity helped win World War II.

For her tenth birthday, Rosemary Rita's grandmother Mimi sends her a magical hourglass, which takes Rosemary Rita back to 1870 in Germany to meet Mimi's great grandmother and help her decode a mysterious postcard.

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...

"¿Qué pasaría si descubrieras que tu familia es una de las más poderosas de toda del historia de la humanidad? ¿Y si te dijeran que la fuente de poder de la familia está escondida por todo el mundo en forma de 39 pistas? ¿Y si, además, te dieran a elegir entre tener un millón de dolares... o conseguir la primera de las pistas? Si fueras Amy y Dan Cahill, ¡escogerías la pista y emperazarías una carrera muy peligrosa!" --From publisher's...

Cairo, 1933. The Egyptian capital is a buzzing hive of treasure-hunters, thrill-seekers, and adventurers, but to 12-year-old Ronald "Rocket" Robinson, it's just another sticker on his well-worn suitcase. All that changes when Rocket and his pet monkey, Screech, find a strange note written in Egyptian hieroglyphs which launches Rocket into an adventure more incredible than anything he's ever seen at the Saturday matinee. Guided through the secret subterranean...