Publisher algorithmic acumen

I'm on the mailing lists for a few academic publishers, because I like to poke through their lists when they have sales on for useful history, anthropology, etc. books for writerly research.

I suspect I'm not the only one. Today I'm looking at geography books at Routledge, because one of my side projects is a map of the larger world of my book, which I should really get around to naming one day, and I'm now mildly panicking about weather, climate, landforms, etc. and I want a good basic geography-cartography book to look at. On the page for An Introduction to Geological Structures and Maps, which might actually be a wee bit advanced for what I'm doing (and is expensive enough I'll ILL it if we don't already have a copy in the library), I happened to scroll to the bottom and spotted the Recommended For You section...
( cut for suspense )

That's a list of books for writers if ever I saw one.

(no subject)

ok I can tell this academic publisher website uses fuzzy logic in its searches...( cut for sex worker slur )