CritiqueBrainz reviews for BookBrainz entities

This project intends to expand CritiqueBrainz's infrastructure to include reviews and ratings for BookBrainz entities. Reviews increase the visibility of books and increase their chances of being discovered by additional readers. On both the apps, users will be able to create, post, and read reviews for BookBrainz entities. This project is partially implemented in python on the CritiqueBrainz side and partially in React and Javascript on the BookBrainz side.