I usually have a few different ones going on at once. I just finished "Hilarity Ensues" by Tucker Max, which was hilarious! I'm in the middle of the Stephanie Plum series, just started The Hunger Game series, and almost done with "The Men with the Pink Triangle", which is a short book about gay men and the holocaust.
"When people are ready to, they change. They never do it before then, and sometimes they die before they get around to it. You can't make them change if they don't want to, just like when they do want to, you can't stop them." - Andy Warhol