This is a free website that allows users to search for books not only by the title or author, but by ISBN numbers.
I found this helpful for when textbooks are hard to find. Instructors usually provide the ISBN numbers in their syllabi and this is one resource a student could use to locate out-of-stock books.
Open access ( OA) is the practice of providing unrestricted access via the Internet to peer-reviewed scholarly research. It is most commonly applied to scholarly journal articles, but it is also increasingly being provided to theses, book chapters, and scholarly monographs.