Use the library on-line catalog to locate books relevant to your topic.
Unless you know the title and/or author of the book you are looking for, research topics should be searched by Keyword to maximize the number of references for a topic. If for example, you wanted to locate books about poverty in city environments, you could enter "urban poverty" as a search term. A keyword search using "urban poverty" yielded 130 results.
Another way to search is to browse by Subject. For example, if you use "poverty" as a search term, you will see that the topic breaks down into 105 subtopics.
A high number of subtopics is often an indication of an overly broad topic.