Grace Livingston Hill 
The Chance of a Lifetime [EPUB ebook] 

Sherrill and Alan, lifetime friends, have always known they belonged together. But when Sherrill is invited to New York to visit her wealthy relatives and Alan is offered a chance to travel to Egypt and take part in an important archaeological dig, the offers seem like the chance of a lifetime.
But there is more to these offers than meets the eye. Sherrill’s aunt has her own plans for her niece, plans that would horrify Sherrill if she knew; Alan must decide if he will sacrifice his family for his career.
Are these the real “chances of a lifetime” they appear to be? Or will Sherrill and Alan miss their chance to learn what true happiness is?