Your API responses work fine, but at the moment they don’t scale very well. You need to make them more consistent across all endpoints by using conventions, as well as anticipate adding things like pagination to your response. If you’ve consumed a few APIs, you have probably noticed that response data formats vary between each API. Understanding each API format can be challenging enough, but add inconsistencies between endpoints within the same API and it can be a frustrating user experience.
Your current API response for all books looks something like Listing 7-1.