I'm interested in the way covers vary for different countries. Even when the language is the same.
The Josh Kirby covers for Discworld [0] were a big draw when I saw them in Ireland the UK. The covers in the US and Australia much less so.
/u/cstross [4] has written in his blog about how little control an author has over the cover of their work. That's visible when comparing the UK and US version. Slinky sexbot in the US [1] vs galleons in space (or whatever that is) for the UK version [2]
[0] https://www.tor.com/2014/08/25/12-reasons-to-read-and-love-t... [1] https://www.amazon.com/Saturns-Children-Freyaverse-Charles-S... [2]https://www.amazon.co.uk/Saturns-Children-Freyaverse-Book-1-... [4]https://www.antipope.org/charlie/blog-static/2010/03/cmap-6-...