sources

https://github.com/thieol/pywikidata/blob/master/request.py
www.loc.gov/standards/sru/
www.programmableweb.com/api/library-congress-srw
www.programmableweb.com/api/google-books
https://developers.google.com/books/docs/v1/getting_started
http://isbndb.com/api/v2/docs
https://viaf.org
librarything
goodreads

Start by reviewing request.py and the linked SRU, Google Books, ISBNdb, VIAF, LibraryThing, and Goodreads resources. The issue does not identify a specific integration, code change, or acceptance criteria, so the scope and definition of done must be clarified before implementation.

Written by the indexing model from the issue text.