Past Imperfect
| Book | Past Imperfect |
| Imprint | Pocket Book |
| Publisher | Pocket Books, Inc. |
| First Published by | Doubleday, Doran |
| Copyright Holder | Ilka Chase |
| Published in/by Arrangement with | Doubleday & Company, Inc. |
| Format | Mass-Market Paperback |
| Language | English |
| Location | New York, NY, USA |
| First Paperback Printing | 1946-08 |
| First Printing | 1942-03-20 |
| Copyright | 1941 |
| Copyright | 1942 |
| Pages / Font | 250 pages |
| Series Number | 404 |
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