BaSICCally said:
The Stranger by Albert Camus
That is an excellent book. Here's some more fiction suggestions:
A Scanner Darkly by Philip K. Dick
The Fountainhead by Ayn Rand
The Three Stigmata of Palmer Eldritch by Philip K. Dick
100 Years of Solitude by Gabriel Garcia Marquez
Fear and Loathing in Las Vegas by Hunter S. Thompson
The Da Vinci Code by Dan Brown
Gold Coast by Kim Stanley Robinson
Autobiography of a Brown Buffalo by Oscar Zeta Acosta
Flow My Tears, The Policeman Said by Philip K. Dick