Remorseless by Thomas Tessier
Monsters are real. They lurk in the darkest places of this world, waiting to devour you, ready to tear into you. But the scariest monsters are the ones within you, driving you mad, feasting on you from the inside. They will eat you until there is nothing left, until the monster is all that remains. Until there is only sadness and insanity. And cruelty.
Fifteen tales from the mind of horror master Thomas Tessier.