Patricia Highsmith: SUSPENSION OF MERCY Z49

Sydney Bartleby has killed his wife. At least, he has thought about it, compulsively, repeatedly, plotting schemes, designing escapes, forging alibis. Of course he has; he's a thriller writer. He even knows how to dispose of her body. But when Alicia takes a long, unannounced holiday, Sydney descends into the treacherous world of his own fantasy.