Books are a great way to begin. They give organized descriptions and analysis of topics and provide excellent background for your research. Below are a few possibilities that may be of interest. Use the OneSearch box to search for more.
OneSearch searches any of the following areas: the library’s collections of print and electronic books, print and electronic journals, articles, theses, media resources, and course reserves materials.
Here's a link to the complete list of the CU Libraries' databases:
Some options for broad, multidisciplinary databases are: