i’ve never really looked into OpenLibrary. as non dev, what i like about goodreads is the functionality of finding indie books no one has ever heard of in other languages than English, Spanish etc which i haven’t been able to find anywhere else unfortunately. 
but it seems like maybe with OpenLibrary you may be able to add books that don’t exist - but i have no idea how OpenLibrary actually works. i might have to look more into it. 
what are the pros and cons of using OpenLibrary vs Goodreads?