When an anonymous letter implores them to travel to the Caribbean, Henry Alabaster and his weather detective uncle are swept up in a puzzling adventure ? one which will take them out to sea to investigate a strangely troubled cruise ship and its supposedly cursed captain Mystery is in the air. Alongside his artistic friend Rachel, Henry will encounter a belligerent sea captain, stories of vengeful ghosts, an impending hurricane, and more adventure than they can shake an umbrella at. As readers dive into this thrilling mystery, they'll also uncover fascinating weather history ? stories about a fateful race to the South Pole, a Mongolian emperor's nation-shaping trouble with typhoons, and even a device invented to predict the weather using living leeches. Better bring your raincoat!