Google is now making web cards for books!

A recent post on The Digital Reader blog (also on Facebook, if you prefer to follow it that way), describes how Google is creating "knowledge panels" (I always just called them web cards, although I suppose they are a special kind of web card) for books when you search on the book title.

See below for examples from two of my books, the first being one with both print and ebook formats and the second for an ebook-only title.

Naturally enough, the "Preview book" link takes you to Google Books. This is true whether there is a print version or not. There is no mention that I can find of Smashwords, Amzon/Kindle or any vendors other than Google, Barnes & Noble, and Kobo, except that the GoodReads site is owned by Amazon and always includes their links.  

The only title I don't have on Google Books is Where Magic Rules, and its web card doesn't get a preview link at all. Maybe I need to load that one onto Google Books, too?