Please ignore the reactionaries in here. Some of the anti-psychiatry views espoused here are reasonable, but the particularly rabid ones are lacking in merit.
For instance, believing anything Robert Whitaker says about schizophrenia is laughable, when his writing is littered with misinterpretations of studies on the subject. There is value in his other commentaries, though.
I am pursuing a similar path; currently, I hope to become a Physician's Assistant and work particularly with severe addiction and severe psychiatric issues. An existential concern I have had is that I will end up in work that is unexciting, uninteresting, and/or meaningless, but as far as I can tell, this career path is exciting, interesting, and meaningful. Certainly more exciting than working with an ordinary patient population...
So I have a suggestion in terms of literature which you may find interesting. Like the suggestions given so far, you will have to take much of it with a grain of salt, but I enjoy the literature on psychedelic drugs, both generally and in treatment.
Aldous Huxley's The Doors of Perception is a classic, if somewhat trite, work in this genre. Other notable authors include Timothy Leary, Terrence McKenna, and Ken Kesey. William S. Burroughs, while not horribly involved in psychedelics, is similarly of interest, particularly works such as Naked Lunch and The Soft Machine. Another semantically related author is Frank Herbert, author of Dune, the famous and beautiful novel and series, who personally knew Timothy Leary and found basis for his concept of Melange in psilocybin mushrooms.
For actual contemporary research on psychedelics, MAPS, the Multidisciplinary Association for Psychedelic Studies, is a good research. A secret hope of mine is that, as MAPS predicts, MDMA will be Schedule II for PTSD and other anxiety therapies in the relative future, and that my qualifications will permit me to work in that emerging field.
Don't take all of this as an attempt to convert you, or some such thing, or a claim that the literature on the subject is without issues. I just feel that it is one of the most fascinating topics in psychology and that anybody working in the field would benefit from an at least passing exposure to it, especially given many people's knee-jerk, uneducated, thoroughly negative responses to even the mention of such substances.