Hi, I'm trying to request a developer key but going to the keys link[1] takes me to a page to confirm my password, where I can enter my goodreads password or confirm via FB. However there are no options for Amazon customers.
Thanks for letting us know. As a workaround: If you do a reset password request, you should be able to get a goodreads password set up, then you can use that.
[1] https://www.goodreads.com/api/keys