Search Goodreads.com from Alfred.
Download from GitHub.
Search by book/author
View your bookshelves and add/remove books
List books by author
List books in series
Open details on Goodreads.com
Add custom scripts to pass book data to other programs/URLs
See the documentation on GitHub for more information.
The workflow will ask you to authorise it to read your Goodreads data (via OAuth) on first run.