The Invisible Man by H G Wells
Griffin is a scientist who learns to control light refraction with the human body...sort of. He has learned to make himself invisible, but now he can't undo the experiment. So he heads off to a small English village where he gets a room to try to figure out how to reverse the procedure. And while he begins terrorizing the village, the villagers begin to figure out his secret.
I enjoyed this book more than I expected to. It's one of those where you think you know the story because it's rooted so deep in popular culture. Like Frankenstein, it's been retooled and played with so much during the last century you're never sure what is authentic. I would suggest everyone read it. It's not very big in size but it's huge in creepiness.