It started with a kidnapping. A shadowy organization known only as the Vespers snatched seven members of the Cahill family and demanded a series of bizarre ransoms from around the world. Thirteen-year-old Dan Cahill and his older sister Amy began a global treasure hunt, determined to bring back whatever Vesper One needed, so long as it kept the hostages safe. But when they deliver the last ransom, Amy and Dan discover Vesper One's terrifying endgame....

After years in foster care, April gets to live in a mansion where she and four other children are caught up in a mystery related to a missing heir, a lost legacy, and the Phantom.

In this story inspired by Jules Verne's "20,000 Leagues Under the Sea," Ana Dakkar, a freshman at Harding-Pencroft Academy, a five-year high school that graduates the best marine scientists, naval warriors, navigators, and underwater explorers in the world, makes astounding discoveries about her heritage and puts her leadership skills to the test against deadly enemies from a rival school.

"When best friends Abbi and Skylar witness a clandestine meeting between a mysterious woman and someone in a dark van, they're thrilled. Finally, a mystery to spice up the summer! Who could these people be? Why are they meeting? Are they spies? Criminals? The two girls are determined to find out. But then a local woman goes missing and is found dead in the woods. And Abbi and Skylar realize that their detective work could hold the keys to solving...

Bestselling author Jude Watson takes Amy and Dan on a thrill-packed ride for the 4th installment of The 39 Clues series.

Betrayed by their cousins, abandoned by their uncle, and with only the slimmest hint to guide them, fourteen-year old Amy Cahill and her younger brother, Dan, rush off to Egypt on the hunt for 39 Clues that lead to a source of unimaginable power. But when they arrive, Amy and Dan get something completely unexpected - a message...

An ancient jungle temple holds the secrets to stopping the evil Herobrine! Gameknight999's true enemy has finally surfaced: Herobrine, an artificially intelligent virus that wants to escape Minecraft and destroy mankind with their own creation-the Internet. If he is able to escape the game and get online, Herobrine will infect millions of computer systems and turn machines and weapons on their masters, threatening all of humanity. After facing Herobrine...

Amy and Dan Cahill have been located once again, this time in the company of the notoriously unreliable Alistair. 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.

Olivia Twist is an innovative reimagining of Charles Dickens' classic tale Oliver Twist, in which Olivia was forced to live as a boy for her own safety until she was rescued from the streets. Now eighteen, Olivia finds herself at a crossroads: revealed secrets threaten to destroy the "proper" life she has built for herself, while newfound feelings for an arrogant young man she shouldn't like could derail her carefully laid plans for the future.

Olivia

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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.

Instead of being rescued from a plane crash, as in the author's book Hatchet, this story portrays what would have happened to Brian had he been forced to survive a winter in the wilderness with only his survival pack and hatchet.