Earlier quoted context omitted.
Well at least I would brag that I have a great-great-grandfather at Harvard :D. Joke aside, I see your point.
The one detail I was unable to find was "What is the book about?" Ironically, I think I'd be okay with my skin adorning an anatomy textbook!
From what I've gathered it's a writer/poet/actor striken by grief who ponders about what happens after death, and about the notion of a soul, both historically (he seems to be speaking a bit about hinduism and greco-roman conceptions of a soul), philosophically, and theologically.
While this still doesn't justify the initial act of using someone skins, knowing the title in french makes it clear that there is a posthumous thematic, I haven't realized that it may not be obvious to non-french speakers.