primary sources
» ketamine: dreams & realities
by Dr Karl Jansen (2001)
Straddling both the recreational and medical worlds, Jansen explores in details K use, experiences, pharmacology addiction and health issues, and finally Ketamine's potential as a psychedelic prop for psychotherapy and healing. Jansen is as close the world gets to a world-expert on Ketamine. This is a honest, well-written and authorative manual for anyone interested in the subject.

secondary sources
» erowid.org