The Library Catalog records include Subjects, or tags from an official list. They describe the subject of the books or materials. It can be helpful to use these words or phrases to search for books. Some examples:
Africa -- Social life and customs
Cooking
Cooking -- African
Cooking, African -- History
Food -- History
Food -- Research
Food -- Social aspects
Food habits
Food habits -- Africa
Food habits -- Africa -- History
Food habits -- Political aspects
Food habits -- Social aspects