| Author | C. S. Lewis |
| Imprint | Collier Books |
| Publisher | Macmillan Publishing Company |
| Copyright Holder | Macmillan Publishing Company |
| Preface by | C. S. Lewis |
| Format | Paperback |
| Language | English |
| Pages / Font | 128 pages |
| ISBN 10 | 0-02-086890-1 |
| Price | $4.95 |
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