I just saw this plugin and installed it. I'm pretty sure it's not the plugin's fault, but I can't link it to my GoodReads account. When I click on the 'Authorize Plugin with Goodreads' button, I get the following error:
calibre, version 2.41.0
ERROR: Goodreads Failure: The request contacting Goodreads has failed. Please try again.
URL:
http://www.goodreads.com/oauth/request_token
Response Code: 401
Invalid OAuth Request
I did some looking into this, even going so far as to register as a developer and get a GoodReads API key, and it could be that the underlying OAuth library isn't working properly. But I would have expected people to be complaining about the plugin if that were true.
I can't see what I would have done wrong. I am able to get Goodreads metadata and even link to a Goodreads book using this plugin and the Goodreads metadata plugin, so it just seems like an OAuth problem.