On a cold December night in 1926, the woman who taught the world how to unravel crimes simply vanished. The Agatha Christie disappearance was not fiction, not a clever plot twist, but a real-life mystery that left Britain holding its breath. Her car was found abandoned, her belongings left behind, and the country’s most brilliant mystery writer became the subject more frantic than any she had ever imagined. For eleven days, Agatha Christie was nowhere to be found. Police searched the countryside. Newspapers screamed headlines. Ordinary people volunteered to help, convinced they were living inside one of her novels. And yet, the clues led nowhere. No ransom note. No clear…