Where the Wild Things Are - Maurice Sendak
The druggies bibles
Fear and Loathing in Las Vegas- Hunter S. Thompson
Naked Lunch, or Junkie- William S. Burroughs
Doors of Perception- Aldous Huxley, or brave new world if you like Sci Fi
If you do get naked lunch, get the special new addition. It has a diary in the back with Burroughs's experience with almost every drug on the planet