Rafael Sabatini 
The Lost King 

The Lost King tells the story of Louis XVII – the French royal who officially died at the age of ten but, as legend has it, escaped to foreign lands where he lived to an old age. Sabatini breathes life into these age-old myths, creating a story of passion, revenge and betrayal. He tells of how the young child escaped to Switzerland from where he plotted his triumphant return to claim the throne of France.