If you are off campus and find a book that is only available in print, reach out to me for help: abaruzz1@swarthmore.edu.
I can look for an ebook, scan pages or chapters, or, possibly, have the book sent to you.
Unlike most Science disciplines, Math researchers rely heavily on information published in BOOKS in addition to journals. The QA section houses all of our Math books and is by far the largest section in Cornell Library. Interdisciplinary math books will be found under other call numbers in all of the TriCo libraries.