Octave Mirbeau 
Torture Garden [EPUB ebook] 

Another woman in another niche had her limbs spread, or rather, torn apart; her neck and arms were clamped in iron collars. Her eyelids, nostrils, lips and other parts were rubbed with red pepper, and two thumbscrews crushed her nipples. Farther on a young man was suspended by means of a rope passed under his armpits; a great block of stone hung from his shoulders, and you could hear the cracking of his joints. Still another, his back arched, balanced by an iron wire which bound his neck to his two big toes, was crouching with sharp-pointed stones in the bend of his knees. The niches in the trunks were becoming empty. Only from place to place there was a man bound, crucified, or hanging, whose eyes were closed and seemed to be asleep–and perhaps was dead. Clara spoke no more, and no longer explained anything.
"Torture Garden" by Octave Mirbeau is a classic erotic novel, published in 1899. It contains graphic sexual descriptions and themes on violence and torture.