Melmoth by Sarah Perry

Twenty years ago, Helen Franklin did something she cannot forgive herself for, and she has spent every day since trying to hide from its memory. But the sheltered life she has crafted for herself is about to change.

A strange manuscript has come into her possession filled with testimonies from the darkest chapters of human history. Each one records sightings of a tall, silent woman in black, with unblinking eyes and bleeding feet: Melmoth, the loneliest being in the world. Condemned to walk the Earth forever, she tries to beguile the guilty and lure them away for a lifetime wandering alongside her.

Average condition, bent corner.