Using the the chronicles of two participants in the Fourth Crusade - the one a common knight (Robert de Clari), the other a leader involved in decision making and the important work of an envoy (Geoffrey de Villehardouin) - we follow the growth of the Fourth Crusade through the elevation of Pope Innocent III, the negotiation with the Venetians, the ruinous agreement that was the result, and all the way up to the gates of Zara.
Geoffrey de Villehardouin. Memoirs or Chronicle of The Fourth Crusade and The Conquest of Constantinople, translated by Frank T. Marzials. J.M. Dent, 1908.
Three Old French Chronicles Of The Crusades: The History Of The Holy War; The History Of Them That Took Constantinople; The Chronicle Of Reims, translated by Edward Noble Stone. University Of Washington Publications In The Social Sciences, 1939.
Madden, Thomas F. Enrico Dandolo and the Rise of Venice. The Johns Hopkins University Press, 2003.
Madden, Thomas F. Venice: A New History. Viking, 2012.
Queller, Donald E. The Fourth Crusade: The Conquest of Constantinople, 1201-1204. Leicester University Press, 1978.