Jessica Kuper 
Lexicon of Psychology, Psychiatry and Psychoanalysis [PDF ebook] 

Originally published in 1988, this volume provides a broad and eclectic view of psychological theory, methods and practice, covering not only the main branches of academic psychology but also psychiatry, psychoanalysis and other psychotherapies. Although some research and practices will inevitably have moved on, it will still be an ideal companion for students and a useful work of reference for mental health professionals, and indeed for anyone interested in contemporary scientific thinking about the human brain, mind and personality.