P. G. Wodehouse 
Prince and Betty 

The story tells of how unscrupulous millionaire Benjamin Scobell decides to build a casino on the small Mediterranean island of Mervo, dragging in the unwitting heir to the throne to help. Little does he know that his stepdaughter Betty has history with the young man John Maude, and his schemes lead to a rift between the newly reunited pair.(Excerpt from Wikipedia)