"Mia and her friends resurface at the well's end to discover an astounding underground civilization, and immediately find themselves drawn into a terrible civil war"--
- ISBN10 0147517915
- ISBN13 9780147517913
- Publish Date 1 March 2016 (first published 3 March 2015)
- Publish Status Remaindered
- Imprint Speak
- Format Paperback (US Trade)
- Pages 304
- Language English