Patrick Carman
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"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...
2) 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"--
4) 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.
5) 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.
6) 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.
9) 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.
10) 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"--
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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.
12) Quake
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Teens Faith and Dylan finally go head-to-head with the mastermind behind their "pulses"
13) 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...
16) Rivers of Fire
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Atherton was once a magnificent three-tiered world, but few inhabitants know the truth of its dark origin: it is a giant man-made satellite, created as a refuge from a dying Earth. Now this strange place is torn apart—its three lands, formerly separated by treacherous cliffs, have collapsed and collided. But a gifted climber and adventurous orphan boy, Edgar, is determined to discover the secret of Atherton's survival, and embarks on a life-or-death...
17) The Dark Planet
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In the dazzling conclusion to the epic story of Atherton, Patrick Carman takes readers on the most rewarding journey of all, to the perilous realm of The Dark Planet: Earth.
When Edgar discovers a way to leave the mysterious satellite world of Atherton, he couldn't have imagined the gloom that awaited him on the dark planet, where the oceans are toxic, the forests are full of mutant monsters, and children toil in darkness, controlled by...
When Edgar discovers a way to leave the mysterious satellite world of Atherton, he couldn't have imagined the gloom that awaited him on the dark planet, where the oceans are toxic, the forests are full of mutant monsters, and children toil in darkness, controlled by...
18) 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.
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From the creator of the Land of Elyon comes a riveting adventure set in an extraordinary satellite world?created as a refuge from a dying Earth?that begins to collapse and forever change the lives of its inhabitants. Edgar, a gifted climber, is a lonely boy scaling the perilous cliffs that separate the three realms of Atherton: a humble fig grove; a mysterious highland world of untold beauty and sinister secrets; and a vast wasteland where he must...