Help! Help!

I am leaving for Punta Cana on Monday and I need beach book recommendations! I know a lot of you guys are big readers, so I'm hoping you can help me out. What I am in the mood for is CRAP. But a very specific kind of crap. I am desperate for some new virus/plague type books. Let me explain.

For beach reading I have always been HUGE into Michael Crichton but I've gone through all his stuff. I love Richard Preston's books, read those too. I love time travel back to the black death stuff like the Doomsday Book, Timeline, and the Plague Tales.

PLEASE tell me there are more books in this 'genre' that I haven't read yet. Anything fast-paced, gripping, and involving some kind of virus or plague outbreak would be SUPERB!!!

Thank you, flist!