The undisputed giant of online retail, Amazon offers an unparalleled selection of books, including new releases, bestsellers, used books, textbooks, and audiobooks. Their Kindle platform provides a vast library of eBooks, and Prime members benefit from free shipping and access to various reading programs.

As a prominent brick-and-mortar bookstore chain with a strong online presence, Barnes & Noble provides a familiar and trusted experience for book lovers. They offer a wide selection of books, Nook e-readers, and eBooks. With features like B&N's Nook e-reader and membership program offering discounts and exclusive offers, Barnes & Noble provides a comprehensive shopping experience for bookworms.

Beyond a wide selection of books, Books-A-Million also offer magazines, toys, and collectibles. BAM! often provides exclusive editions and signed copies, making it a draw for collectors.

Based in Portland, Oregon, Powell's is renowned for its expansive physical bookstore. They translate this eclectic atmosphere to their online store, offering a unique selection of new, used, and rare books. Powell's champions literary culture and provides detailed descriptions of their books, making them a haven for passionate readers.

Abebooks operates as a vast online marketplace connecting independent booksellers worldwide. This platform offers a wide array of books, from common titles to rare and out-of-print editions. Searching Abebooks is ideal for finding specific editions, signed copies, or books that are no longer readily available.

Focusing on affordability, ThriftBooks specializes in selling gently used books at deeply discounted prices. They offer a vast inventory spanning various genres, making it a go-to destination for budget-conscious readers.

Supporting independent bookstores, Bookshop.org allows you to purchase books online while directing a portion of the sale to a local bookstore of your choice. It's a socially conscious option for book lovers who want to support their community.

Being the owner of the Android operating system, Google gives a wide scope for their own e-book offerings, making sure people can find all kinds of e-book for the best reading experiences.

For Apple/IOS users, Apple’s is for readers to purchase and read e-books on their Apple devices, offering integration with the Apple ecosystem.

Similar to Abebooks, Alibris acts as an online marketplace connecting independent booksellers. They offer a wide selection of both new and used books, as well as hard-to-find titles. Alibris emphasizes a user-friendly search experience and provides information on each seller, fostering trust and transparency.

BookOutlet specializes in selling remaindered books and overstocks at significantly reduced prices. They offer a wide selection of titles across genres, providing opportunities to discover new authors and expand your reading collection without breaking the bank. Be aware that selection can be limited and change frequently.

A website from the American Booksellers Association (ABA), IndieBound emphasizes the importance of supporting independent booksellers and local communities. While primarily a directory for finding independent bookstores near you, IndieBound also allows you to purchase books online and have them shipped directly from participating bookstores.