1984 classic
I actually just got done reading Cats Cradle, and it was pretty good, and two days ago i finished an unknown book called Darkmans By Nicola Barker, it was pretty interesting, kinda along the lines of a modern day Great Expectations, but with more plot and suspense.
I really like classic literature. so One Flew over the Cuckoos Nest, I read Siddartha a few months ago, and it was quite nice. Tao Te Ching, Art of War, the Testament. pretty much everything that your told to read from Highschool and on.

Though i will say, that there are two books which i personally will say changed my life, and those were 1984, and the book Anthem. I would highly recommend anthem if you havent read it, like siddartha it is short, but its impact is grave. and 1984, the book that opened my eyes, more people should read it and not talk about it like they have.