oh oh oh a seriously difficult text was Houses of the Blooded. I did manage to read through the whole thing, but it was a Herculean effort, between actual physical problems I had with the book (it’s too small and chunky and the type size is too small) and it affects a non-standard grammar and writing style which are very high barriers for me to read through.

Also Apocalypse World for the same writing style issues. And for procedures that were in some cases very nebulous and I was unable to turn the rules-text into a list of actions and decision points that I could use.