not sure if sfw, but the Lovely Bones is the worst book i've ever read. it was required reading for school over the summer when i was in like 10th grade or something, and it was so bad and disturbing that i couldnt finish it enough to get past the first chapter, let alone do the summer reading assignment. i still passed that test tho, because i bullshat the answers, but it was possibly the worst reading experience of my life.