Edgar, an eleven-year-old orphan, finds a book that reveals significant secrets about Atherton, the strictly divided world on which he lives, even as geological changes threaten to shift the power structure that allows an elite few to live off the labor of others.

"A strange telegram lures fourteen-year-old Amy Cahill and her younger brother, Dan, deep into Russia and away from the only trustworthy adult they know. Signed with the initials NRR, the telegram launches a race to uncover a treasure stolen by the Nazis and the truth behind the murder of the last Russian royal family. All too soon, the treasure hunt starts to smell like a Lucian trap. But the bait might just be irresistible--what will Amy and Dan...

"Twelve-year-old Alexa Daley is looking forward to spending another summer in Bridewell with her father. She wants to explore the maze of rooms and passages in the old lodge where they stay each year. She's also eager to solve the mystery of what lies beyond the immense walls that were built to keep out an unnamed evil that lurks in the forests and The Dark Hills - an evil the townspeople are still afraid of. As Alexa begins to unravel the truth about...

After the destruction of the planet Atherton, Edgar must journey to a dark and damaged world named Earth in order to find the secrets of his civilization's past.

Having explored every part of the fantastical Whippet Hotel, Leo discovers that it hides even more amazing secrets beneath its foundation, in an adventure that puts the hotel's fate in Leo's hands.

Leo and Remi have gotten used to the strangeness of the Whippet Hotel, but when the entire top floor is hoisted into the sky and transported to the field of wacky inventions, they find that they must compete against a number of foes to solve a puzzle or lose their beloved hotel forever.

When thirteen-year-old Alexa embarks on a mysterious quest, she finds her old friends Yipes the little man, Murphy the squirrel, Odessa the wolf, and Squire the hawk have been designated to help her.

Using sophisticated technology and impressive coding skills to track down advanced cyber criminals, four savvy teens close in on a dangerous hacker before realizing that they are being led into a trap, in a story told through a collage of video segments, text, and website postings.

There are still some secrets that Ryan and Sarah haven't uncovered yet. And there's still a shadowy figure standing in their path ... someone who doesn't want Ryan and Sarah digging up any more of the past.