I Found That: Miner V - Achievement Question

[TarynH]

I read they fixed the glitch not letting us obtain the pickaxe.
I currently still have 141/150 unique items gathered, and have obtained every ARR item as well as the Heavensward ones from both mining and quarrying. Do I need the mastery books too for Regional Folklore to have any chance of getting the achievement?

Yes, you need the folklore book items. The only things that don't count are items from "favors," as far as I know.