"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...
When she finds the key to a secret passageway leading out of the walled city of Bridewell, twelve-year-old Alexa realizes her lifelong wish to explore the mysterious forests and mountains that lie beyond the wall.
Ten-year-old Leo's future and the fate of the extraordinary Whippet Hotel, where his father is the maintenance man, are at stake when a series of cryptic boxes leads Leo to hidden floors, strange puzzles, and unexpected alliances.
"Leo has explored the zany, wonderful Whippet Hotel from basement to top floor, with trains, flying goats, and mazes (among other things) in between. But even Leo doesn't know every secret of the Whippet - and when he discovers that there's more beneath the hotel than he'd thought, it doesn't take long for more adventures to unfold!"--Dust jacket.
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.
In the year 2051, when most Americans live in one of two gigantic, modern States, Faith Daniels, part of a dwindling group that lives between, learns that she, like other misfits, has unusual abilities that could help when the inevitable war begins.
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.
Alexa Daley and her friend Yipes find themselves stranded on in a strange secret community known as the Five Stone Pillars, where each pillar contains it's own secrets, and twelve-year-old Alexa must fight to defeat the darkness.
Although housebound following an eerie accident, teenaged Ryan continues to investigate the strange occurences in his hometown of Skeleton Creek, recording his findings in a journal and viewing email video clips sent by fellow detective Sarah. The reader may view Sarah's videos on a website by using links and passwords found in the text.
Ten-year-old Harold, the adopted son of a food inventor, discovers that his father's latest invention, soda pop that produces the world's longest burps, also generates furry creatures known as Fizzies.
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.
Stanley Darrow isn't sure what to expect when the mysterious Mr. Gedrick appears on his doorstep. He is certain, however, that his family could use Mr. Gedrick s help: Their lives and their house have been a mess since Stanley's dad died.
Although forbidden to see each other, Ryan and Sarah continue their investigation of the mysterious happenings at the dredge by communicating through video clips, text messages, midnight meetings, and journaling. The reader may view videos on a website by using links and passwords found in the text.
After Atherton's three-tiered world collapses, ending the geographical division of the social classes, Edgar, Samuel, and Isabel try to restore the flow of water and uncover the world's mysterious origins in the process.