For best results, search by ISBN An ISBN is the 10 or 13 digit number, usually printed on the back of a book with a bar code, that serves as a unique identifier for the book. Searching by ISBN is the best way to search because it will get you the exact title and edition that you need. Many professors include the ISBN on their syllabi or in their course management system. If you don't have the ISBN, try a title or author search. Title search Enter all words in the title you are looking for. Author search Enter all or part of the author name you are looking for. Keyword search You can search by keyword but this approach is not recommended as it will likely return a large set of results. To refine your results, use the filtering/sorting options Filter options include product type and discipline area.