Peter James: The Perfect Murder [2014]

Victor Smiley and his wife Joan have been married for nearly 20 years. Victor secretly loathes Joan more and more each day. Joan is bored by Victor, and his snoring drives her mad. Their marriage has reached a crisis point. Victor decides there is only one way to get Joan out of his life for ever, but he's about to get a nasty surprise. As it turns out, Victor's not the only one with murder in mind.