Chris Ward is a respected historian who has specialised in Bomber Command history, especially 5 Group, of which 617 was a member. He has had access to wartime records and ex-squadron personnel. He lives in Lutterworth, Leicestershire.
..".a great balance between historical research and easiness for reading... covers with impressive details the operations, without being a dry enumeration of the mission debriefing reports...highly recommeded."--IPMS/USA