Whilst Amazon seems to be having problems with ABs it looks as if Google isn't having a clear run of things in the resultant confusion. In fact, things look downright weird from here.
Normally, Google has a good run of books, at least 40 rows in SF, then slightly less in General, Space Opera, Military with the others being empty and will cause a 404 error. The books are pretty reliably SF/F, then yesterday the book count dropped to 17 rows per genre (in SF, I didn't look elsewhere) but importantly the rows are filled with odd selections of genres, not the expected sets.
the picture shows what I mean, Erotica has infiltrated the SFF genre
