SPM, to answer your question on another thread, just after my H told me that he wanted to leave, I found a book called "All you need is love and other lies about marriage" which was a real eye-opener for me about some of my behaviour. I wish I had read it years ago.
In DR and the Sex-Starved Marriage, Michele makes some of the same points, which again increased my understanding of the situation from my Hs point of view. I hope to one day give him the SSM to read - it may help him heal some things, too.