The Mysterious Balloon Man

As the 18th century ends and the 19th century begins, changes abound all over Europe. Absolute monarchy is coming to an end, England and Spain struggle for supremacy in the Atlantic and the Mediterranean, and France is in conflict with all its neighbours. Meanwhile, on the other side of the ocean, a new power is starting to emerge: the United States of America.
In the midst of all these changes, Alfred Gordon, a civil servant employed by the British secret service, makes a discovery that wil...