[DONE] Request to add cover: "Number 96 Cookbook"

[RM]

Scans captured by me of the copy I own: https://imgur.com/a/OzrGMW6

(Nil ISBN, as the book was published in 1975)

The entry can also be cleaned up a bit:
* Editor's name is Joy Hayes
* Title doesn't need a full stop

[Martin]

Done