There are also two genres with a similar name: "audio books" and "audiobooks", but the ebook store doesn't include audio books. Genres could be automatically generated.
Google has recently registered a lot of domains like googleplaymovies.com, googleplaynewspapers.com, googleplaymagazines.com, googleplaytv.com and this suggests that Google Play could offer subscriptions for magazines, newspapers and TV shows.
{ Thanks, Joel. }