Countdown
| Imprint | Tor |
| Publisher | Tom Doherty Associates, Inc. |
| Copyright Holder | David Hagberg |
| Format | Mass-Market Paperback |
| Language | English |
| Location | United States of America |
| Printed | 1991-04 |
| Copyright | 1990 |
| Pages / Font | 495 pages |
| ISBN 10 | 0-812-50964-1 |
| Barcode | 0 37145 00495 2 |
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