In a world where an uneasy peace binds Humans and Nightlings, fourteen-year-old Genna and her twelve-year-old brother Dan learn of their uncle's plot to gain immortality in exchange for human lives, and the two strike their own bargain with the Nightlinglord, which sets them on a dangerous journey along the Moonroads in search of a key.lord, which sets them on a dangerous journey along the Moonroads in search of a key.
- Genre: Juvenile Fiction
- Subgenre: Action + Adventure / General, Science Fiction + Fantasy + Magic
- Age: 9-12 years
- Publisher: Orchard Books
- Pages: 361
- Language: English
- Format: hardcover
- Release Date: May 1, 2008
- Date Published: May 1, 2008
- Author: Holly Lisle