What are some alternatives?
AbeBooks - AbeBooks has millions of new & used books, rare books and out of print books.
Amazon - Online shopping from the earth's biggest selection of books, magazines, music, DVDs, videos, electronics, computers, software, apparel & accessories, shoes, jewelry, tools & hardware, housewares, furniture, sporting goods, beauty & much more
The Book Depository - The Book Depository (Guernsey) is the UK's largest dedicated online bookseller, offering the...
Clutch Prep - Helps college students get better grades with videos
Bibliotech - Bibliotech is the Spotify for textbooks.
Bookfinder - Find nearly any book: new, used, rare and textbooks.