The Warlock (Waterspell, #1)

Drawn into the schemes of an angry wizard, Carin glimpses the place she once called home. It lies upon a shore that seems unreachable. To learn where she belongs and how to get there, the teenage traveler must decipher the words of an alien book, follow the clues in a bewitched poem, conjure a dragon from a pool of magic -- and tread carefully around a seductive but volatile, emotionally scarred sorcerer who can't seem to decide whether to love her or kill her.