| Author | Larry Niven |
| Publisher | Ballantine Books |
| Publisher Series | Ballantine Science Fiction |
| Series | Tales of Known Space, Known Space |
| Copyright Holder | Larry Niven |
| Cover Art by | Rick Sternbach |
| Illustrator | Rick Sternbach |
| Format | Paperback |
| Language | English |
| Location | United States |
| Printed | 1976-06 |
| Copyright | 1968 |
| Pages / Font | 254 pages |
| Catalog Number | 24509 |
| ISBN | 0-345-24509-1-150 |
| Price | US $1.50 |
| Notes | First Canadian Printing: August 1971 inside front and inside back cover art by Rick Sternback |