"Twelve-year-old Brine Seaborne and her friend Peter find themselves in an adventure with pirates, invisible bears, and a seriously evil magician"--
- ISBN10 1627794204
- ISBN13 9781627794206
- Publish Date 5 July 2016 (first published 30 June 2016)
- Publish Status Active
- Imprint Henry Holt & Company
- Format Hardcover
- Pages 320
- Language English