Hi. My post was automatically deleted, so I'll try to ask my question here. Hope it's ok.

I've used Goodreads for years but now I'm looking for an alternative. I need a book API for my new service but Goodreads doesn't issue new keys to developers and is planning to close the service.
I wonder what is the best alternative to Goodreads? I only need the ability to add books to shelves and use their API.