The Last Plantagenets: The Pageant of England Series, Book 4

The final volume in A History of the Plantagenets covers the century from 1377 to 1485 when civil war ravaged England, rebellious peasants marched on London and wandering preachers sowed dissent in the credulous poor.
The last Plantagenet monarchs governed in violence and confusion. Kings came and went, deposed or murdered. Princes and nobles slaughtered or were slaughtered in bloody battles or private feuds. It was an era of brilliant successes, tragic reverses and wild extravagance.