Powers and Thrones: A New History of the Middle Ages

by Dan Jones

It would be difficult to think of a greater inversion—or even perversion—of the original mission of crusading than a Latin king of Jerusalem losing his head in a war against the pope.

But by 1425 John the Fearless and John the Pitiless had both been murdered (the Fearless was bludgeoned to death on a bridge; the Pitiless was assassinated with a poison prayer book).