Patrick Carman
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Description
"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...
3) Floors
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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.
4) Omega rising
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"The Voyagers land on a planet made entirely of water where they must find the third element of the Source that will save the Earth"--
7) Stargazer
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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.
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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.
10) 3 below
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"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.
11) Pulse
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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.
12) Into the mist
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Captain Roland Warvold tells Alexa and Yipes about the adventures he shared with his brother Thomas in Elyon, before the wall went up and divided the world in two.
13) The dark planet
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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.
14) Quake
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Teens Faith and Dylan finally go head-to-head with the mastermind behind their "pulses"
15) Tremor
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"In the year 2051, one group of telekinesis masters attempts to use their powers to stop another group of telekinesis masters from destroying the world"--
17) The crossbones
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"Sarah and Ryan are in deep trouble...they've discovered a dark secret ... something that everyone in their hometown of Skeleton Creek, Oregon, seems to want to keep from them. Why? It just doesn't make sense. The answers are at the old, abandoned dredge. The last time the two teenage detectives went out to the creepy dredge, Ryan ended up unconscious and in a cast at the hospital. Ryan is stuck at home, but Sarah can continue to solve the mystery...
19) The raven
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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.
Author
Description
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.