Books I liked:

Dreamseller by Brandon Novak
I am Legend by Richard Matheson
Memoirs of a Geisha by Arthur Golden
Jurassic Park by Micheal Crichton
The Hunger games trilogy by Suzanne Collins
The thief of always by Clive Barker
All or Nothing by Dennis Foon
The beach by Alex Garland
Fight club by Chuck Palahnuik


Type of books I'm interested in:

"Mind fuck books" where the main character is mentally disturbed or becomes insane throughout the book
Books about addiction (gambling/drugs etc)
Interesting dystopian society books
Biology books (Richard Dawkins etc)

Recommend please, I'll donate fg if I read a book and like it!

I don't know if these match your criteria, but here are some books/series I enjoyed.

Inheritance Cycle - Christopher Paolini
House of the Scorpion - Nancy Farmer


Damn, I can't really think of any right now, but when I think of some more, I'll post.

How do you feel about fantasy/sci-fi?
Have you ever tried reading Lovecraft? His works usually focus heavily on sanity, but as an older author (1900-1920), I find him hard to read sometimes.