Can I jump in here - because strangely enough I have a copy of the book here with me...
Murray Peden was a Canadian who became an important figure in Canadian legal circles post-war. The book is rightly regarded as a Bomber Command classic because it is very detailed and more 'literary' than many others. Peden is a superb writer and depply sympathetic to his fellow-flyers.
It was first published in Canada in 1979 and subsequently by the IWM in London - it can sometimes be tricky to find but there should be some on 'Bookfinder'.