John Huss and the Hussite Wars: Book 3 of Wylie's History of Protestantism centering on Huss and his influence on the Reformation.
Roots of the Protestant Reformation: Part III of this site discusses the theological influences of Wycliffe, Hus and Erasmus on the later Reformers.
The Northern Renaissance and the Background of the Reformation: Discusses the Devotio Moderna, mysticism, the invention of printing, and humanism and its effect on the Reformation.
The Pre Reformation Era: Links to the Waldenses, Wycliffe, John Huss and the Lollards.
The Pre-Reformation Movements: A comprehensive presentation of the people and movements which anticipated the ideas of the Reformation: The Devotio Moderna (teachings of the Brethren of the Common Life), John Wycliffe and the Lollards, Jan Hus and also the Waldenses.
Wicliffe and His Times: Book 2 of Wylie's History of Protestantism, with an excellent history of Wycliffe and his influence on the Reformation.