Before the lady explorer became available I had one explorer set up for adventures including the Sophisticated Pillager skill. I got fairly valuable additional quests from time to time (though less than 30% of the time). I recovered the books & set the lady up to be my new adventures explorer giving the right skills.
I'm not sure how long ago it was we got her but I haven't had an additional quest since then. She very occasionally brings back 3 adventures/map parts but that is it.
BB say 30% is a low probability (!!!) & months without that skill producing results is quite possible without there being a bug. I'm not convinced.
Anyone else having this problem?