book database - SERP Analysis

https://isbndb.com/

https://isbnsearch.org/

https://search.worldcat.org/

https://www.reddit.com/r/datascience/comments/19enkjv/i_made_a_book_database_site_that_allows_you_to/

https://www.librarything.com/

https://www.fictiondb.com/

https://openlibrary.org/

https://books.google.com/

https://isbndb.com/blog/book-api/

https://www.hathitrust.org/