Grace Livingston Hill 
Street of the City [EPUB ebook] 

When a neighbor becomes sick, an elderly woman hails a skater using the frozen river to commute to work. Val Willoughby is happy to help the family and alert the daughter, Frannie, at her job. When Frannie Fernley meets Val, there is instant attraction, but they are from different walks of life. Then when the local weapons plant is threatened, both Val and Frannie are pulled into intrigue that will shake their faith in God and man.