An event, a lecture @ BP, £15 (excludes BP itself), on 25/11/23 3pm: More on this link: Meet the Author: Dr David Kenyon Via a BP email: Link to podcast: Bletchley Park / E156 - Italian Tiebreaker
That sounds like a very interesting book. I've read about the Arctic Convoys but I don't remember if Bletchley Park intelligence was included in them.