The WMU Libraries uses the Library of Congress (LC) classification for its books.  Because of its many specific classifications, you will most likely find books on your topic in multiple call number ranges.  Use the catalog to identify books, and if you see a pattern emerging in call numbers, then you can go browse in that area in the stacks.

HV 4961-4995 Degeneration/
HV 4997-5000 Substance Abuse/
HV 5001-5840 Alcoholism, Drug Abuse/
HV 6001-6773 Criminology/
HV 7231-9960 Criminal justice and administration/
HV 8301-9920.5 Penology, including police, prisons, punishment, reform, and juvenile delinquency