An escalating race to find the 39 Clues finds Amy and Dan pursuing a Clue guarded by thousands of the world's best-trained soldiers, an effort that separates them in explosively dangerous ways.

Spending each season traveling in their Rambler before settling into a small town in Virginia, Derby and her father and brother open a concession stand at a minor league baseball stadium only to be confronted by difficult news, secrets, and a plea for help.

In 1940, during the Blitz, Kat Bateson is sent to a school in a Scottish castle that is said to be haunted by dark magic from the past, but when some of her classmates disappear, she wonders if the magic exists very much in the present.

Twelve-year-old twins Nick and Eryn investigate why their mother and new stepfather are keeping secrets, why they are forbidden to meet their stepsiblings, and, most important, why their lives are in danger.

Ten-year-old Jane Doe, the only student average enough to be excluded from the town of Remarkable's School for the Remarkably Gifted, is joined at her public school by the trouble-making Grimlet twins, who lead her on a series of adventures involving an out-of-control science fair project, a pirate captain on the run from a mutinous crew, a lonely dentist, and a newly constructed bell tower that endangers Remarkable's most beloved inhabitant--a skittish...

After their father's research experiment at the British Museum unleashes the Egyptian god Set, Carter and Sadie Kane embark on a dangerous journey across the globe--a quest which brings them ever closer to the truth about their family, and their links to a secret order that has existed since the time of the pharaohs.