Each Branch library is arranged according the the Library of Congress Classification system. Once you know the general area where books on your topic are kept, it can be very effective to browse the shelves. How to read a call number
Sociology (General) HM401 - HM1281
Social history and conditions. Social problems. Social reform HN1 - HM995
The Family. Marriage. Women HQ1 - HQ2044
Communities. Classes. Races HT51 - HT1595
Social pathology. Social and public welfare. Criminology HV1 - HV9960