To locate books, which will mostly be secondary sources, you can search from the Mardigian Library Catalog found on the Mardigian Library Homepage. Under the section "More Research Tools" go to the "Books & E-books" link :

Books that are in print (paper) will have a call no., location in library and availability (e.g. if it has been checked out)

E-Books will have an "Access Online" link. Click there to access the book on your device (laptop/desktop, tablet, phone)

Evaluate the material with some of the criteria below. One way to actually determine if an item is useful for your assignment is to browse through the book. Look at the table of contents, index section, etc. Also if in the library for a print book, browse the shelves around the item, possibly finding related material. With e-books, many have links to related books that you can browse as well.
Not finding the book you need? Try using our Interlibrary loan service, MeLCat, and other UM campuses to borrow books and other materials.