You'll want to consider the following questions before you select your topic:
You can get ideas for research topics from several Chabot Library databases:
Browse the list of reports by topic to see all the reports related to health, social trends, criminal justice, international affairs, education, the environment, technology, and the economy in America.
Browse the list of research topics to find all related reports on more than 800 hot topics in business, politics, government, education, and popular culture.
This database searches hundreds of volumes of reference titles (subject encyclopedias) and other e-Books on a varety of subjects, think of it as the Library's Wikipedia.
The Library also has in reference the Library in a Book series.