The Bletchley Collection by Joanne Scrace for Eden Cottage Yarns
This is the gorgeous Bletchley Collection book, with six patterns (knit and crochet) by Joanne Scrace, inspired by Bletchley Park. The book is full of rich photography, and background information, as well as the six patterns. It has a complimentary pdf download code which you can use on Ravelry.
The book includes patterns for knit and crochet.