A visually dynamic companion to the biographical collection Dark Hearts, this collection of biographies details the cruel and often horrifying lives of history's most notorious—and deadly—people.

Over centuries and around the world, there is a long history of ruthless people who have wreaked havoc to get what they want. Whether empire-building or simply displaying a cruel streak, is there any excuse for the actions of people who have been responsible for the deaths of so many? Find out in these sixteen biographies of men and women throughout history who have left there deadly mark on history. From Attila the Hun and Vlad the Impaler to Adolf Hitler, listeners will learn the wicked origins of the world's most dangerous people.