Nancy Werlin's "Impossible" is an engrossing young adult novel with a supernatural twist. Covering typical teen novel topics such as date rape, foster parents, and the boy next door, "Impossible" throws in a family curse, magical tasks, and impending insanity to create a suspenseful and intriguing story. Lucy, raised by foster parents after her mother went insane after her birth, now finds herself pregnant at age 17. The only clue to her possible doom is the ballad her mother passed down her, which is a more sinister version of the song "Scarborough Fair". Lucy must use the song as a guide to the tasks she must perform in order to break the curse on the women of her family; if she fails, she too will be doomed to go insane upon the birth of her daughter. The characters are sharply drawn and believable, taking the grist of many a teen drama and adding the spice of a supernatural mystery... as well as reaffirming the power of true love and family. "Impossible" is geared toward teens, but is a nice, entertaining, and compelling read for adults as well.