Amazon Matchmaker is a single location for Kindle books in your library that have Audible books that are matched through the whispersync program (where you can move back and forth seamlessly from audiobook to kindle book.)
I really like the concept of the whispersync. I love audiobooks and as long as the price is not much more, I am willing to purchase both for the ease of being able to move between the kindle book and audiobook. (Plus I prefer to re-read a book in a different format. So if I read first on kindle, I like to re-read on audio or vice versa.)
This is the first time Amazon has had all of the whispersync enabled books from your library in a single place. I have tried to get this info several times previously. When I asked Audible customer support they can told me what books that I already own on audiobook that have a kindle option. But they can’t tell me what kindle books that I own have an Audiobook option. And from Amazon’s side, they have told me that all I can do is go through my kindle books one by one from the Manage My Kindle page and look to see which one has the whispersync option.
So the fact that this is a one stop look is great news. But the implementation is awful. At least it is awful for those of us Kindle users that have large libraries. I have a large kindle book library (around 3500 kindle books and nearly 700 audiobook.)