"Amy and Dan Cahill have been located once again, this time in the company of the notoriously unreliable Alistair Oh. Could they have been foolish enough to make an alliance? Spies report that Amy and Dan seem to be tracking the life of one of the most powerful fighters the world has ever known. If this fearsome warrior was a Cahill, his secrets are sure to be well-guarded . . . and the price to uncover them just might be lethal."--Publisher.

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.

Throughout the hunt for the 39 Clues, Amy and Dan Cahill have uncovered history's greatest mysteries and their family's deadliest secrets. But are they ready to face the truth about the Cahills and the key to their unmatched power? After a whirlwind race that's taken them across five continents, Amy and Dan face the most the difficult challenge yet -- a task no Cahill dared to imagine. When faced with a choice that could change the future of the world,...

Hank the Cowdog, Head of Ranch Security, is framed for the murder of a chicken and becomes an outlaw with the coyotes.

At school before Parents' Day, Nancy and Bree are on the case when a prized possession goes missing, and Nancy decides to make her guitar teacher and her favorite babysitter fall in love on Valentine's Day.

The Alden children discover clues that could help them figure out why a man vanished from a run-down yellow house on Surprise Island.

Nine-year-old Nicholas Benedict, a boy without parents and afflicted with an unfortunate nose and narcolepsy, is sent to a new orphanage where he encounters vicious bullies, selfish adults, strange circumstances, and a mystery that could change his life forever.

With two attorneys for parents, thirteen-year-old Theodore Boone knows more about the law than most lawyers do. But when a high profile murder trial comes to his small town and Theo gets pulled into it, it's up to this amateur attorney to save the day.

Though scoffed at by Harold the dog, Chester the cat tries to warn his human family that their foundling baby bunny must be a vampire. Overview: Beware the Hare! Is he or isn't he a vampire? Before it's too late. Harold the dog and Chester the cat must find out the truth about newest pet in the Monroe household - a suspicious-looking bunny with unusual habits-and fangs! Though scoffed at by Harold the dog, Chester the cat tries to warn his human...

Timmy Failure, founder, president, and CEO of the greatest detective agency in town, perhaps the nation, is about to crack the biggest case of his generation: a school competition to find a stolen globe.