If I might suggest, and if you haven't already read:
"The Mighty Eighth", Roger Freeman
And four outstanding personal recollections:
"Serenade to the Big Bird", Bert Stiles (hard to find, from a B-17 co-pilot who did not survive the war)
"B-17s Over Berlin", ed. Ian Hawkins (stories from the 95th BG)
"The Lucky Bastard Club", Eugene Fletcher, 95th BG
"A Wing And A Prayer", Harry Crosby, 100th BG
Happy reading :)