| Main centres: | 1-3 business days |
| Regional areas: | 3-4 business days |
| Remote areas: | 3-5 business days |
Hardcover first published 1964 by Hutchinson of London. The jacket is whole, but with light edge-wear and small tears in places. The boards are clean and square, with a bump to the head of the spine. All pages are clean and unmarked. The author "advances the theory that all creative activities - the conscious and unconscious processes underlying artistic originality, scientific discovery and comic inspiration - have a basic pattern in common, which he attempts to define."
