There are many great book websites out there, but some popular ones include Goodreads, BookBub, and Book Riot. Goodreads is a popular social networking site for book lovers, where you can track the books you've read, see what your friends are reading, and get recommendations based on your reading preferences. BookBub sends you daily emails with discounted and free ebooks that match your reading preferences. Book Riot is a website that offers book recommendations, news, and reviews for all types of readers. Ultimately, the best book website for you will depend on your personal reading habits and preferences.