Im reading the millennium series right now (The girl who played with fire books) and I love them. They are pretty intense and graphic, just a warning
If you like light reading, Emily Giffin is very good IMO (For chick lit)
Also if you like non fiction (I LOVE NON FICTION)
I really enjoyed Nickle and Dimmed, Barbara Ehrenreich (its older but well worth reading)
and then Scratch Beginnings goes kinda along with it, by Adam Sheperd
Loose Girl (cant remember authors name) is really good
Candy Girl, Diablo Cody, one of the funniest books Ive ever read
If you like funny... I love all of Chelsea Handlers books, except the one written by her friends.