Book excerpt: So you think he's cheating? This book gives you simple yet versatile tools--from lists of telling clues to stealthy cell phone apps--that will help you confirm your suspicions or ease your fears. Expert authors Rea Frey and Stephany Alexander pair online savvy with the tips and tricks of a private investigator, priming you to outwit your man--no matter how sneaky he's been. You'll get inside his head to learn everything there is to know about where he's been and what you need to do next. When you're done, you'll know: How to catch him in the act Which rules cheaters live by When there's a way to forgive When there's no choice but to forget With this book, you'll know when he cheats, how to catch him red-handed, and where to find a relationship that will make you happy for a lifetime.