The ability to distinguish reality from fantasy is supposedly the root of sanity.
But if a man lives in two worlds, and both are real, what then? Is he mad, or sane? One person, or two? And if one of his worlds should begin to grow dim, a shadow world, could one say he was in danger of going sane?
- ISBN10 034501653X
- ISBN13 9780345016539
- Publish Date 7 January 1972 (first published June 1967)
- Publish Status Unknown
- Out of Print 18 October 2003
- Publish Country US
- Publisher Random House USA Inc
- Imprint Ballantine Books Inc.
- Edition New edition
- Format Paperback
- Pages 218
- Language English