The Secret of ZI
| First published | 1961 |
|---|---|
| Publisher | Digit Books |
| Format | Paperback |
| Type | Novel |
| Catalog ID | R515 |
| Cover art | Brian Lewis |
| Pages | 156 |
| Price | 2/6 |
- No printing date, edition, printing or printing number line in book.
- Year from Tuck
- "First U.K. publication in Book Form. U.S. edition by Ace Books, New York." on copyright page.
- © Ace Books, Inc., New York 1958.
- Cover artist not credited in book. Signature "Brian (over) Lewis" is on the artwork.
- Note that title page has "Z1" instead of "ZI".
| Year | Reviewer | Publication |
|---|---|---|
| 1959 | Hans Stefan Santesson | Fantastic Universe, March 1959 |
| 1959 | Floyd C. Gale | Galaxy Magazine, October 1959 |