I built the simmilar stuff for Reddit using Amazon links. http://booksreddit.com http://booksreddit.com I'm in the process of adding Goodreads and other book w

I built the simmilar stuff for Reddit using Amazon links. http://booksreddit.com http://booksreddit.com I'm in the process of adding Goodreads and other book websites to get better suggestions.(Using Amazon API is limiting on scale) As for your question: I've been researching python natural language processing to get probable named entities and check them against Amazon API. I suggest https://spacy.io https://spacy.io that has reasonable named entities extraction. However doing it at a scale might produce lot of books that are named as a common phrases.