Niki and Emmet are siblings with a secret; their ability to change from human to animal, and back-their ability to transform-she to a cat, he to a hawk. Their mother is clueless, but how much does the elusive writer Slanger know? Is their classmate Doug as superficial as he seems? Is the psychiatrist a caretaker or an enemy? And what did she have to do with their father's disappearance? Alternating 4 voices, paralleling the transformations of adolescence itself, this book is also about the transformative power of great literature, on the border between the darkest fantasy and our own reality.