Diane Duane
9) A Wizard
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Description
While Nita grieves over her mother's death, Kit tackles a challenge as dangerous as it is strange: Rescue a young wizard who has vanished on his first assignment. This new wizard is unlike any other--he's autistic and he's a magical prodigy. His power is enormous. Now Kit and his dog, Ponch, must track down the missing boy before the Lone Power finds him.
10) A wizard alone
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While Nita mourns her mother's death, teenage wizard Kit and his dog Ponch set out to find a young autistic boy who vanished in the middle of his Ordeal, pursued by the Lone Power.
12) Dark mirror
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One hundred years after an accident with the dimensional barrier introduced four shipmates to an alternate universe, the sinister members of that universe discover a doorway into Picard's time, and plot to replace his Enterprise with theirs.
13) Spock's world
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A crisis on Vulcan brings Spock and the Enterprise to a conflict which might lead to Vulcan's secession from the Federation.
14) Omnitopia dawn
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In an increasingly wired and computer-friendly world, massive multiplayer online games have become the ultimate form of entertainment. And the most popular gaming universe of all is Omnitopia, created by genius programmer Dev Logan. For millions of people around the world, Omnitopia is an obsession, a passionate pastime, almost a way of life. But there's a secret to Omnitopia, one that Dev would give his life to protect-the game isn't just a program...
19) Deep wizardry
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Even though she's on vacation at the beach, young wizard Nita is still on active duty, available to assist any other wizard in distress. So when Nita meets the wizard S'reee, she is bound to promise help. Nita is needed to face the Lone Power, who is threatening life in the oceans. But although S'reee is a wizard, she is also a whale. Nita will need to shapeshift into a sea creature to join her. And when Nita learns that the final confrontation will...