Mostly Harmless
| Book | Mostly Harmless |
| Imprint | Heinemann |
| Publisher | William Heinemann Limited |
| Typeset by | Falcon Graphic Art Ltd |
| Printed by | Clays Ltd, St Ives plc |
| Series | The Hitchhiker's Guide To The Galaxy |
| Format | Hardback |
| Language | English |
| Location | London |
| Reprinted | 1992 |
| Pages / Font | 219 pages |
| ISBN | 0434 00926 1 |
| Barcode | 9 780434 009268 |
| Price | UK £12.99 / CDN $19.99 |
| Series Number | 5 |
| Notes | Ninth 1992 reprint. The fifth book in the Hitch Hiker's Guide to the Galaxy trilogy. |
Added by dzed