Top 6 Books in Realtime Backend / API

The top products on this list are Readerware Book Database, Booxter, and microsoft.com Book Catalog. All products here are categorized as: Software and platforms related to reading, managing, and discussing books. Platforms providing backend services and APIs for real-time applications and data management. One of the criteria for ordering this list is the number of mentions that products have on reliable external sources. You can suggest additional sources through the form here.