This is a very good thread. Got some great recommends from it. I have read a few post-apocalypse books. I was wondering why they are so popular. There's an interesting comment early on in "The Day of the Triffids":
""My way of life, my plans, ambitions, every expectation I had had, they were all wiped out at a stroke [...] And, curiously, what I found that I did feel - with a consciousness that it was against what I ought to be feeling - was release ..."
There's something very ... liberating about the end of civilization as we know it
Also, I vote for "The Furies" by Keith Roberts.