In 1963, when twins Henry and Helen and their best friends, Alan and Nicki, try to find Alan's missing brother, Carl, they stumble into the knowledge of their "subtle forms" that can separate from their physical bodies, and into a criminal's plot to make himself immortal--at any expense.
- ISBN10 0544813111
- ISBN13 9780544813113
- Publish Date 20 December 2023 (first published 7 April 2015)
- Publish Status Active
- Publish Country US
- Imprint HarperCollins Publishers
- Format Paperback (US Trade)
- Pages 256
- Language English