High on a Hill — Frances Y. McHugh

When Carol Benson was jilted by the man she loved, she made up her mind that the only cure for heartbreak was a complete change of scene. So she quit her job in a New York advertising agency, closed her bank account, and headed for Pads in the springtime to forget. Little did she know that, instead of escaping, she was heading for a reunion -- with her erstwhile sweetheart; his bride, Gloria; and the bride's father, who was also Carol's former employer!

Also published as The Root of Evil