People going crazy.

Hey everyone! What are some good books about people going crazy? Preferably in the first person? Something like Stephen Kings Ballad of the Rubber Bullet or a book told by a crazy person like American Psycho or something like the Tell Tale Heart.

I want to see insanity.

I could recommend one, but you'd think this was a bit presumptious of myself. I could send in a story of mine, called "Black Web". Its in Portuguese, so it takes a couple of hours translating it. Its a mix of classic pulp noir and cyberpunk /space opera. It was for a contest that i failed epicly to win. So I'd like to see what the boards have to say about it. Its a short story (to be true, more like a really short novella) and its in the first person so i guess it could fare well