A gent I follow on Twitter is a historian and PhD candidate. James Jefferies puts up some interesting tweets, one recently was a snapshot of several WW2 aviation books in his library. This eventually inspired me to do the same, even if I was clumsy and included 'contaminating' books from the ground and sea.
Above is just a small sample of my collection. As an RCAF member in the RAF, my dad was aircrew on Lancaster bombers: hence my interest in the Allied bombing campaign.
On one of my trips to England I spoke with author Martin Middlebrook ― I just rang him up ― and he was very pleasant, and helpful in my research. When I eventually got back here to Canada I found a piece of airmail awaiting me from Mr Middlebrook. He supplied me with some additional information based on our conversation. What a nice bloke.