Horned Pigeon, a book by George Millar, who was in The Rifle Brigade in North Africa in WW2. Marginally relevant for me as I was in their cadet force (it was compulsory, even for cowards). It's about his capture and subsequent attempts to escape. I won't say anymore, other than that it's very long but well worth persevering with. Have any of you read it? George Millar has a wiki page, if you want to check. A fascinating character.