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MouseStar 1 is surrounded by floating space junk! It's yucky -- and dangerous. It's coming from a nearby planet, Cleanix. Geronimo Stiltonix goes to visit, and discovers that the aliens there are very wasteful. Even worse, robots that they've thrown in the trash have started to rebel! Can the spacemice restore harmony before the robots take over?
84) Robot warriors
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It is time for the annual Robot Warriors contest, when each student has to build a robot to compete in various trials--but when John Riley finds himself in direct competition with his best friend Kaal he is worried that their friendship will not survive the test.
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"You'd think saving the universe not once but twice would buy you a little time off. Not so for Kevin Brewer and his science-camp buddies. They've just got word that their favorite comic book author, Max Grayson, is in terrible danger--and so is the universe! The kids have no choice but to head to outer space to save their hero and prevent a diabolic breed of aliens from annihilating their home galaxy."--
86) The Arctic code
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The Earth is in the grip of a new Ice Age, and when twelve-year-old Eleanor's scientist mother disappears in the Arctic, Eleanor sets off on a dangerous journey to find her--and uncovers a mystery, a crime, and evidence that Earth has been visited by extraterrestrials.
87) Thrive
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"The alien invasion of Earth is imminent. But maybe not all the aliens are united. A rebel faction has reached out to Anaya, saying there's a way to stop the larger invastion--a way for humans and hybrids and cryptogens to work together. Can they be trusted? Or is this a trap? It's not even clear if Anaya, Petra, and Seth are united--some of the hybrids think they'd be better off if the aliens won . . . With everything on the line, these three teens...
91) Bloom
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The first book in a can't-put-it-down, can't-read-it-fast-enough action-thriller trilogy that's part Hatchet, part Little Shop of Horrors! The invasion begins--but not as you'd expect. It begins with rain. Rain that carries seeds. Seeds that sprout--overnight, everywhere. These new plants take over crop fields, twine up houses, burrow below streets. They bloom--and release toxic pollens. They bloom--and form venus-fly-trap like pods that swallow animals...
92) Infestation
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"Rae discovers that killer alien centipedes have overrun the town of Whispering Pines, while Caden deals with the fallout of his brother Aiden's return from the Other Place"--Provided by publisher.
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Life on Knowhere is pretty good for Peter and the other Guardians of the Galaxy. That is until Captain Marvel arrives. She tells Peter that a shape-shifter is on Knowhere and holds the key to a powerful weapon capable of destroying entire planets, including the Earth! With a race against time, the duo must find this mysterious villain before he detonates the device.
95) Friend or UFO
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When Sky's grandmother is kidnapped, Sky discovers her secret life as an undercover FBAI agent, and embarks on a mission filled with puzzles, codes, and risky adventures to save her.
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Klawde is not your basic cat. He's an emperor from another planet, exiled to Earth. He's cruel. He's cunning. He's brilliant...and he's also Raj Banerjee's best friend. Following a humiliating, defeated effort to conquer Earth, Klawde has had it with this this dismal planet. And anyway, what's the point in conquering such an insignificant corner of the galaxy, when there's an entire universe to rule? Luckily for Klawde, the position of Emperor of...
98) Mr. Wuffles!
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"Mr. Wuffles ignores all his cat toys but one, which turns out to be a spaceship piloted by small green aliens. When Mr. Wuffles plays rough with the little ship, the aliens must venture into the cat's territory to make emergency repairs"--
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Only a day passes since Edwy got home from the strange Fredtown to meet his parents for the first time, and then he finds himself caught away again, this time to Refuge City, where he is still not allowed to question things. Finding other children brought from the Freds, Edwy discovers that everyone has been keeping secrets from him, and that Rosi and his other friends left behind are trapped in danger.
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Andy and Terry live in a 130-story treehouse. It used to be a 117-story treehouse, but they added another 13 stories. It has a soap bubble blaster, a time-wasting level, a 13-story igloo, the GRABINATOR (it can grab anything from anywhere at any time). It is a toilet paper factory, and an extraterrestrial observation center for observing aliens. As it turns out, though, it's Andy, Terry, and Jill who are being observed and then abducted by a giant...