<p>Shortlisted for the Hearst Big Books Award, 2019<br><br><br>Sometimes a promise becomes a prison.<br><br><br>Fearing eternal singledom, childhood friends Kate and Paul make the age-old vow that if they don't find love by thirty, they will marry each other.<br><br><br>Years later, with the deadline of their 30th birthdays approaching, the unlikely couple decide to keep their teenage promise. After all, they are such good friends. Surely th...