Engineers use books in various ways. Handbooks and encyclopedias provide background information but are also tools to find equations, material properties, and other valuable pieces of information needed by engineers to succeed. Books are especially important in a college setting. Alternative textbooks can provide another perspective for students struggling to learn a new principle. Other books can provide overviews to aid in learning. Search in the ND Catalog for the books owned by the library, even the ebooks. Note that some books on engineering topics may be located in the main library or the Chemistry/Physics Library.
These resources will help you find unpublished theses and dissertations, which present an author's research and findings as part of their degree candidacy or professional qualification. Many institutions no longer submit their theses and dissertations to ProQuest. You can usually access theses and dissertations at the institutional repository of the university from which the degree was awarded (e.g. CurateND). These institutional repositories are usually associated with the colleges libraries.