NOTE: This list is a republication- Source: Early Bird Books (by Renata Sweeney).
Truly disturbing and dark books aren't for everyone. For some readers, the edgiest thing they’ll cozy up to is a murder mystery solved by a cat. (If this sounds like you, you might prefer to check out these cozy mysteries by Patricia Wentworth.) For others, however, a kitty conundrum just won’t do—some of us crave unnerving, nightmarish novels. If you’re seduced by the grittier side of literature, we recommend the list of dark books below, each of which contain disturbing, subversive stories you'll be thinking about long after the final page.
You can find the list here