Graeme, if you're still interested in books on locating and returning lost airmen have you read any of Andy Saunders books?
His three titles Finding the Few, Finding the Foe and Finding the Fallen are great reads. I have his book on the Stuka attacks on England and the Channel Conveys which is very comprehensive as they have located every Stuka and their crews lost over England and retrieved the remains. Interesting book which I read whilst in Hospital and then of all things had a German Doctor who then proceeded to tell me all about Stukas.
I reminded him that they had lost......twice, which he took in good humour.
Cheers
Wayne