BF is where most psychology books will be housed. If you are not sure where to start, you may want to browse for books. Below are highlighted topics of psychology.
BF 173-175.5: Psychoanalysis
BF 176-176.5: Psychological tests and testing
BF 180-198.7: Experimental Psychology
BF 309-499: Consciousness and Cognition
BF 636-637: Applied Psychology
BF 660-685: Comparative Psychology
BF 692-692.5: Psychology of sex and sexual behavior
BF 698-698.9: Personality
BF 712-724.85: Developmental Psychology
HF 5548.7-5548.85: Industrial psychology
HM 1001-1281: Social Psychology
LB 1050.9-1092: Educational Psychology
RC 321-571: Neurosciences. Biological psychiatry. Neuropsychiatry
RC 436-571: Psychiatry
RC 554-569.5: Personality Disorders
RJ 499-507: Mental disorders, Child psychiatry