Gottman also wrote Why Marriages Succeed or Fail, which my husband really enjoyed and I haven't read yet. Two related books that we've gotten a lot out of are Passionate Marriage by Dr. Schnarch and How Can I Forgive You (the courage to forgive, the freedom not to) by Dr. Spring. If books tend to help, these are very good ones.

But this is also my way of saying, yay, I'm glad things are looking up! ;)