The History of Death Rituals in the Western Hemisphere by Dr Jane Rios Domingo, Ph.D.
It didn’t exactly scream “Don’t Read Me” from the title.
I read the whole book, cover to cover. It was for school, so I had to. It was a textbook on the various rituals that preceded and succeeded death, from the dawn of written history to now. It wasn’t a large book, smaller than a Harry Potter novel, but it took me at least a week to get through it the first time.