Hi all, I would choose a different type of books - maybe not so readable but full of facts:

Jonathan Falconer: Bomber Command Handbook 1939 - 1945 - to get a a general overview

Ian Carter: Bomber Command, 1939-45 - photographic book as sometimes a photograph may tell you more than several pages of text

As for the personal level I do not know much of books in English due to my specific area of interest - RAF/RCAF airmen of Czechoslovak origin.
So if it would be not considered too cheeky I would recommend him mine Moonlight Flyer: Diary of a Second World War Navigator - first hand straight-out account written during WWII by John Gellner DFC - RCAF navigator/pilot of Czech origin with Jewish roots.