The Bletchley Collection, six versatile and timeless designs (knitting and crochet) by Joanne Scrace.
Each pattern takes its inspiration from Bletchley Park and the code breaking work which was undertaken there during World War Two.
The book includes knitted and crochet hats, knitted and crochet cardigans, a knitted vest and a knitted cowl.
The book comes with a complimentary pdf download code which you can use on Ravelry.
Eden Cottage Yarns Milburn 4ply.