The history of the Napoleon family hides many secrets and mysteries. Among such dark spots in the history of the most powerful family of the 19th century, the fate of the son of Emperor Napoleon III, the Prince of the Empire, has long been considered. The mysterious death of the heir to the French throne was surrounded in all subsequent decades by a veil of falsifications and silences. An even greater secret for contemporaries and descendants was the life story of the grandson of Emperor Napoleon III and the son of a prince of the Empire. Influential forces erased the last crown prince of France from European history, and it seemed that his name was lost to us forever. The authors of the book studied a lot of historical evidence, reconstructed the history of the crown prince’s flight and found documentary evidence of his secret life far from his homeland. Researcher, author of popular science books Svetlana Furlong and the writer and screenwriter Andrew J. Rowe made the most important historical discovery in recent times - they established the circumstances of the elimination of the family of Napoleon III from the political arena of Europe, and most importantly, they found the lost crown prince of France. The historical study "The Lost Crown Prince of France" is published in the year 140- anniversary of the death of the Prince of the Empire in Africa.