Practical Demonkeeping by Christopher Moore

The good-looking one is one-hundred-year-old ex-seminarian and "road" scholar Travis O'Hearn. The green one is Catch, a demon with a nasty habit of eating most of the people he meets. Behind the fake Tudor facade of Pine Cove, California, Catch sees a four-star buffet. Travis, on the other hand, thinks he sees a way of ridding himself of his toothy traveling companion. The winos, Neo-pagans, and deadbeat Lotharios of Pine Cove, meanwhile, have other ideas. And none of them is quite prepared when all hell breaks loose ...

In this outrageous debut novel that introduced Moore to an unsuspecting literary community, readers meet Travis, a 100-year-old ex-seminarian and scholar, and Catch, a demon with a nasty habit of eating most of the people he meets.