There are many websites and platforms where readers can become book reviewers and receive free books in exchange for their honest reviews. Some popular options include:
1. NetGalley: A platform where publishers and authors can connect with book reviewers to provide advance reader copies (ARCs) for review.
2. Goodreads: A social media platform for readers where users can connect with authors, publishers, and other readers to review and discuss books.
3. BookSirens: A website that connects authors and publishers with book reviewers who are willing to read and review books in exchange for free copies.
4. LibraryThing: A book cataloging and social networking site where users can review books and participate in giveaways and Early Reviewer programs.
5. Online book clubs and review groups: Many online book clubs and review groups offer opportunities for members to receive free books in exchange for reviews.
These are just a few options for readers interested in becoming book reviewers and receiving free books to review. It's important to remember to always provide honest and constructive feedback in reviews, and to comply with any guidelines or requirements set by the platform or publisher providing the book.