A Promise to Break — Kathryn Spurgeon

Sibyl, a wealthy banker's daughter, meets a penniless hobo with the bluest eyes she's ever seen. He finds work, and she finds she can't keep away from the kindhearted man. But choosing him means betraying her father, his Socialists beliefs, and the plans he's made for her life. This relationship begins a spiritual journey she never expected. As the Great Depression worsens, Sibyl has to choose--security or love?