Thinner — Stephen King

Billy Halleck, good husband, loving father, is both beneficiary and victim of the American Good Life: he has an expensive home, a nice family, and a rewarding career as a lawyer...but he is also fifty pounds overweight and, as his doctor keeps reminding him, edging into heart attack country.

Then, in a moment of carelessness, Billy sideswipes an old gypsy woman as she is crossing the street -- and her ancient father passes a bizarre and terrible judgment on him.

"Thinner", the old gypsy man whispers, and caresses his cheek, like a lover. Just one word...but six weeks later and ninety-three pounds lighter, Billy Halleck is more than worried. He's terrified. And desperate enough for one last gamble...that will lead him to a nightmare showdown with the forces of evil melting his flesh away. And away. And away...