Nil (Nil Series, 1)

Nil (Nil Series, 1) by Matson, Lynne. hardcover edition. ISBN: 9780805097719.

On the mysterious island of Nil, the rules are set. You have exactly 365 days to escape―or you die. Seventeen-year-old Charley doesnt know the rules. She doesnt even know where she is. The last thing she remembers is blacking out, and when she wakes up, shes naked in an empty rock field. Lost and alone, Charley finds no sign of other people until she meets Thad, the gorgeous leader of a clan of teenage refugees. Soon Charley learns that leaving the island is harder than she thought . . . and so is falling in love. With Thads time running out, Charley realizes that she has to find a way to beat the clock, and quickly, in this thrilling debut novel by Lynne Matson.