1808: The Flight of the Emperor: How a Weak Prince, a Mad Queen, and the British Navy Tricked Napoleon and Changed the New World

In a time of terror for Europe’s monarchs—imprisoned, exiled, executed—Napoleon’s army marched toward Lisbon. Cornered, Prince Regent João had to make the most fraught decision of his life. Protected by the British Navy, he fled to Brazil with his entire family, including his deranged mother, most of the nobility, and the entire state apparatus. Until then, no European monarch had ever set foot in the Americas.

Thousands made the voyage, but it was no luxury cruise. It took two months in cr...