Navigate to a website such as Textbooktorrents.com, Textbookrevolution.org or
iChapters.com.
Select "eTextbooks" if the site offers both hard copy and download textbooks.
Type in the title and author, or the ISBN into the available search bar. The ISBN is going to give the most accurate search results. This is because most textbooks have multiple editions, so a title or author search may come up with the wrong book. However, the ISBN is specific for the exact book. Most college professors provide an ISBN along with the title and author information.
Select the textbook you would like to download and click on your shopping cart. Depending on the book, some sites are going to take you straight to the download page, while others take you to the payment page. Complete the payment process to be taken to the download page.
Click "Download" and the textbook downloads to your computer, typically as a PDF file.