My main social group circulate book after book to each other, and the only book I've had any of them complain about was The Conspiracy Against The Human Race by Thomas Ligotti, mostly the complaints were that it was too dark or unsettling to finish reading. I think the author is actually trying to disturb and alienate his readers.
"The Conspiracy against the Human Race is renowned horror writer Thomas Ligotti's first work of nonfiction. Through impressively wide-ranging discussions of and reflections on literary and philosophical works of a pessimistic bent, he shows that the greatest horrors are not the products of our imagination. The worst and most plentiful horrors are instead to be found in reality. Mr. Ligotti's calm, but often bloodcurdling turns of phrase, evoke the dreadfulness of the human condition. Those who cannot bear the truth will pretend this is another work of fiction, but in doing so they perpetuate the conspiracy of the book's title."
--David Benatar, author of Better Never to Have Been: The Harm of Coming into Existence; Department of Philosophy, University of Cape Town, South Africa
I had already owned his My Work Is Not Yet Done, but I bought this book right after I read your post. I've never read anything that speaks to me like this does. I'm one of those people who virulently hates when people mark in books, but I've been leaving asterisks all over this thing. I feel like I've found my bible and I truly appreciate you letting me know about this book.