Grace Livingston Hill 
The Chance of a Lifetime 

This is the chance of a lifetime! thought Alan wistfully as he gazed at his professor’s letter offering him a place in the archaeological expedition to Egypt. But with his father seriously ill from an automobile accident and the whole worry of the hardware store on Alan’s young shoulders, he couldn’t take it. And Sherry’s family thought that her chance had come with the invitation to visit her rich uncle in New York, for they did not suspect the rudeness and sophistication which she would meet there. But Sherry proves her worth and her courage to her uncle and both she and Alan find their chances where they had not expected them, and happiness beyond their brightest dreams…