With the Mothergates dying, Horace and his fellow Keepers fear the weakened gates may unleash a force that will consume the world and their only hope of stopping this is to unlock the secret of a mysterious talisman of power before it is too late.
- ISBN10 0062275925
- ISBN13 9780062275929
- Publish Date 19 November 2019 (first published 13 November 2018)
- Publish Status Active
- Publish Country US
- Publisher HarperCollins Publishers
- Imprint Collins
- Format Paperback (US Trade)
- Pages 448
- Language English