In search of the truth about a mysterious ring stone with phenomenal powers, gem trader Murdoc suddenly finds himself hunted through space by an unscrupulous religious order.
- ISBN10 0441959660
- ISBN13 9780441959662
- Publish Date 1 December 1985 (first published 15 April 1968)
- Publish Status Out of Stock
- Publish Country US
- Publisher Penguin Putnam Inc
- Imprint Ace Books
- Format Paperback (US Mass Market)
- Language English