I really enjoy Seanan McGuire's series about Toby Daye, which is urban fantasy that's heavy on creepy Elves/Faerie. The series gets better as it goes on. This is a lead up to her other series, written as Mira Grant, that are political thrillers set against the zombie apocalypse. The Toby Daye books have such a high creep factor (in a good way) that I was a little hesitant to go the zombie route with this author. I'm not big into horror.

FEED is fantastic! She definitely did her virology/epidemiology homework. Great characters! Guvmint conspiracies! Adventure and politics! It's a scary new world in the Newsflesh books (followed by Deadline and Blackout), but one that I was more than willing to spend the better part of week inhabiting.