Any good futuristic/fictional books?

I liked the Uglies series, the Gone series, Betwixt, The Host, and I just got done reading Unwind. I want to read something around this genre of books. They don't have to be teen books in any way, but I want another good read. Any suggestions? And I don't like the 'Lifetime' books such as Sara Dessen. I like books that make you think. Please don't suggest Twilight! Thank you in advanced! =D