When you read this book, you will make many assumptions. It's about a jealous wife, obsessed with her replacement. It's about a younger woman set to marry the man she loves. The first wife seems like a disaster; her replacement is the perfect woman. You will assume you know the motives, the history, the anatomy of the relationships. You will be wrong. The Wife Between Us is the first collaboration between Greer Hendricks and Sarah Pekkanen; a gripping thriller with film rights sold to the creators of The Girl On the Train.