Excellent!
Something to be aware of (if you already are, then my apologies for stating the obvious
) - if you have or are given a PDF that is simply images of book pages, rather than containing actual text, you may have difficulties viewing it on your Kindle, since the text size settings (and text-to-speech) won't work. You'd have to get it OCR'd (and ideally proofread to eliminate OCR errors) so that you can import the actual text content, rather than simply importing a collection of images of text. Hopefully, though, the disability dept that provides you with the PDF versions of textbooks would be aware of these issues and provide PDFs containing reflowable text.