I have a pronounced weakness for post-apocalypse fiction. It's not the apocalypse itself that gets me, it's the sociological implications of the collapse and rebuilding. So one of the genres I enjoy happens to be zombie fiction. I've read quite a bit, and I have to say that the recent resurgence of zombies into popular culture has proven to be a boon for those of my ilk.
A very brief list of the books/series I have read and enjoyed:
Newsflesh, by Mira Grant
Apocalypse Z, by Manel Loureiro
and of course, World War Z, by Max Brooks.
Even Diana Gabaldon wrote an Outlander novella with zombies!
I'm reading an interesting zombie series now, and will be dropping the author a line to offer editing services. The books have many errors in word choice, not in spelling. For instance, the survivors used water canon instead of water cannon, and that is just one tiny example. Your average spell-check would pass right by these, but they will catch the eye of the reader. I hope that I can convince the author to engage a professional editor, even if it's someone other than yours truly!