If recent history has taught us anything, it's that sometimes the best guide to leadership is the negative example. But that insight is hardly new. Nearly 2,000 years ago, Suetonius wrote Lives of the Caesars, perhaps the greatest negative leadership book of all time. In How to Be a Bad Emperor, Josiah Osgood provides crisp new translations of Suetonius's briskly paced, darkly comic biographies of the Roman emperors Julius Caesar, Tiberius, Caligula, and Nero. Entertaining and shocking, these ancient anti-role models show how power inflames leaders' worst tendencies.