Important Note: In most cases you'll only use a chapter or two for your research so don't be scared off by the length of a book.
If you can't find what you're looking for in the catalog, you can always request resources through Interlibrary Loan or EZBorrow, having them sent from other libraries. For articles, this is quick and takes a day or two on average. If it's a physical item like a book it can take 7-10 days to come in the mail.