Teen triplets Gretchen, Grace, and Greer, descendants of Medusa, continue to battle the monsters who walk the streets of San Francisco, unseen by humans, but realize they must enter the abyss if they are to protect their loved ones--and their world.
- ISBN10 0062001833
- ISBN13 9780062001832
- Publish Date 4 September 2012
- Publish Status Active
- Publish Country US
- Publisher HarperCollins Publishers
- Imprint Collins
- Format Hardcover
- Pages 336
- Language English