I have released version 1.10.0 of the plugin. The major changes are:
Support an additional provider, Amazon Kindle Owners' Lending Library, for US Amazon Prime members. It can search for books that can be borrowed or purchased from Amazon and can update the 'amazon' book identifier to point to the kindle edition of matched books. This is currently only working for the US store at
www.amazon.com. (I wasn't able to find any indication of which books are Prime-eligible at other national Amazon websites.)
Ability to configure author name variants to improve search and match accuracy.
Preserve the dialog box size and position, column sizes and sort order for
Manage discovered books.
Show links for recommendable (!) and purchasable ($) books in the discovered books dialog.
Faster book matching and handling of discovered books. There is a significant performance improvement in the discovered books dialog.