The Unreasoning Mask
| Copyright Holder | Philip José Farmer |
| Publisher | Granada, Granada Publishing Limited |
| Printed and Bound by | Cox & Wyman Ltd |
| Format | Paperback |
| Language | English |
| Location | UK |
| Copyright | 1981 |
| This Edition Published | 1983 |
| Pages / Font | 301 pages / Plantin |
| ISBN | 0-586-05647-5 |
| Barcode | 9 780586 056479 |
| Price | £1.95 U.K. |
| Price | $7.95 Australia |
| Price | $7.50 New Zealand |
| UPC 5 | 0 0 1 9 5 |
Added by Supernaut1970 · Last edited by thethrowback