Grouping Fantasy with Sci-Fi, pah.
Anyway, I recommend The Brief History of the Dead, by Kevin Brockmeier. I read it over Easter; short, very Americany, but a cracking read nonetheless. I like it when writers try to bridge the gap between science(-fi) and theology.
Basically, half the book takes place on Earth - in the near future, where the threat of biological warfare is causing global paranoia. The other half takes place in 'The City', a place after death. Each resident of The City remain there for as long as they are 'remembered' among the living world. Then there's a pandemic on Earth and things go apeshit. Great read.