Stan Drake's The Heart of Juliet Jones #2

Julie meets Johnny, a talented, but ambition-less bridge designer, when he sprains his ankle near the Jones' house. Johnny falls for Julie and wants to marry her immediately. Julie loves him, but when she meets the wife of Johnny's boss, she worries about Johnny's lack of interest in his career and how it will impact their life. Julie's questions prod Johnny into demanding a raise and taking his job more seriously. Julie is getting the house ready for their wedding when Johnny is killed in an explosion at the site of the bridge construction.