For me for example its “Eat me - a natural and unnatural history of cannibalism” by Bill Schutt. Its an amazing book that covers cannibalism in animals and then the history of it in humans (cultural, survival & medicinal cannibalism).
I got a lot of “oh why would someone read something like that?” And “that not something fun to read about!” From relatives but my friends enjoyed the stuff that I could tell them about cannibalism!
The Man-Leopard Murders: History and Society in Colonial Nigeria by David Pratten. I am not saying it’s a “fun” book. It is a historical ethnography of southern Annang communities, and it is full of foreign words (with translations) written in an alien alphabet. Plus, it’s written in the stilted language of an ethno-anthropologist which makes it difficult reading at times. Nevertheless, the information it relates is highly worthwhile. It does recount some cannibalism.