Instructions for extracting lists of books by authors from Goodreads
To extract Goodreads statistics for a list of authors, first find the author home page URLs on Goodreads and store them all in a plain text file, one per line. Next start Webometric Analyst and from the "Services" menu, select the "Goodreads" submenu and the "Download all books by all authors from a list of their Goodreads URLs" sub-submenu option. When prompted, select your plain text file list of authors and wait for Webometric Analyst to finish getting the book information. This may take days if you have a long list of popular authors, but it should not normally take more than an hour.
The results will be in plain text files that you can load into Excel.
WARNING: When Goodreads redesigns its website then this function will stop working altogether without warning, sorry. Please try it with a few URLs to make sure it is working first.