Here is an interesting site on a journal written by a B-17 navigator through his full 25 mission tour during the years of 1942 - 1944. Also includes some interesting photos. ENJOY! http://www.stelzriede.com/warstory.htm
Many thanks for posting that link, PzJgr - it's completely new to me I shall read it at leisure and as you rightly say, the photos alone are very interesting.