I decided to check more accounts and the deal is showing up on some of them. So I tried looking to find something suitable in science fiction...
That is one
hideous interface. I can't narrow it down by price at all. I can select science fiction and fantasy and it gives me a list of sub-genres. Which seem partly random (there's Nebula award winners, not one for Hugo award winners, but a whole sub-genre for Warcraft?) and none of which show me more than a hundred books before stopping. (In fact, most only show me about twenty books.) Based on what I can get the store to
show me from browsing, I would say Google sells a couple hundred science fiction and fantasy books
total. I know that's incorrect, but it appears the only way to find books on Google Play is to already know what you want and search for it.
I gave up, Google can keep their discount.