One of my friends just added Cultish to their TBR recently and I thought, "Hey, that sounds good!" But then I checked the reviews... it's so rare for book review websites to actually critique bad books, but the top reviews for this one were 2-stars. I remember some scathing critiques from linguists (or people with degrees in linguistics) about how this book billed itself as a book on language but ... really wasn't, and didn't have the academic chops to back up its claims.