Deep within the forest is the laboratory where Christina's father works--and where her mother was killed years ago. After an orphan boy named Taft tells her of a secret tunnel, she finds it and helps him escape the orphanage. Soon she and Taft discover there is far more to the mystery of her mother's supposed death.

The Secret of Zoom 2011, Square Fish, New York

ISBN-13: 9780312659332

Trade paperback

The Secret of Zoom 2009, Henry Holt & Company, New York

ISBN-13: 9780805088564