Sixteen-year-old twins Harry and Barry stumble across a gateway to another universe, where a distortion in time and space causes a dramatic change in their competitive relationship.
- ISBN10 0525441611
- ISBN13 9780525441618
- Publish Date 1 April 1985
- Publish Status Out of Print
- Out of Print 17 June 2021
- Publish Country US
- Imprint Penguin Books Ltd
- Format Paperback (US Trade)
- Language English