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Cycler (edition 2008)
Cycler by Lauren McLaughlin
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Wikipedia in English
Amazon.com Product Description (ISBN 0375851917, Hardcover)AS FAR AS anyone at her high school knows, Jill McTeague is an average smart girl trying to get her dream date to ask her to the prom.
What no one knows, except for Jill’s mom and dad, is that for the four days Jill is out of school each month, she is not Jill at all. She is Jack, a genuine boy—complete with all the parts. Jack lives his four days per month in the solitude of Jill’s room. But his personality has been building since the cycling began. He is less and less content with his confinement and his cycles are becoming more frequent. Now Jill’s question about the prom isn’t who she'll go with, but who she'll be when the big night arrives.
(retrieved from Amazon Thu, 12 Mar 2015 18:17:35 -0400)
Seventeen-year-old Jill is a fairly normal high school senior whose focus is on getting a certain boy to ask her to prom, but four days a month she transforms into surly Jack who decides it is time he had his own life and a chance with the girl he wants.
(summary from another edition)
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