In secondary sources, authors analyze and interpret primary source materials. 

Secondary sources can be scholarly or popular.  Scholarly sources (sometimes called "academic" or "peer-reviewed" sources) are written by and for experts and typically include bibliographies and citations.  Popular sources are written for a general, non-expert audience and can be authored by anyone.

Always use the advanced search interface and some combination of the following techniques to increase the effectiveness of your searches:

1. Start by searching Primo for specific titles suggested in subject encyclopedia entries.
2. Identify the Library of Congress Subject Headings for that book to identify more books on the topic.
3. If required for your assignment, make sure that the book is scholarly. 
4. To find eBooks, use the filters on the right to limit your results to eBooks (under "Resource Type")

There are several databases from which to choose when you are seeking scholarly work. For this course, you most likely will want to search one or more subject databases.  Subject databases are focused on a single discipline or interdisciplinary field and index books, essays in books, and scholarly articles.