Napoleon Bonaparte was once asked what makes a good general. His alleged reply—"audacity, audacity, always audacity"—made it onto the long list of sayings attributed to the French commander. It is less clear, however, whether these attributes make for a good ruler. But as Karen Elliott House shows in her new book, The Man Who Would Be King: Mohammed Bin Salman and the Transformation of Saudi Arabia , we might just find out. A longtime observer of the Middle East in general, and Saudi Arabia in