Gravity Is a Mystery
| Format | Hardback |
| Language | English |
| Copyright | 1970 |
| Author | Franklyn M. Branley |
| Illustrator | Don Madden |
| Publisher | Thomas Y. Crowell Company |
| Copyright Holder | Franklyn M. Branley |
| Series | Let's-Read-and-Find-Out Science |
| Format | Hardback |
| Language | English |
| Copyright | 1970 |
| Pages / Font | 33 pages |
| Library of Congress Catalog Card Number | 70-101922 |
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