To label someone a "traitor" is bad enough. To describe or designate someone "The Greatest Traitor" is certainly going to distinguish this individual. From one Mortimer (Ian) to another Mortimer (Sir Roger Mortimer) this book is titled as such.
The period of the three Edwards (see last post) was certainly one of turmoil. The families of the Marches had much to do with this since they saw themselves as "free agents" against the world. The family of the Mortimers were involved in a number of events that were to shape the history of Wales, and they managed to use both sides (Wales/Plantagenets) against the middle.
The life of Sir Roger Mortimer, ruler of England 1327 - 1330 is the subject. He is described as "brutal, intelligent, passionate, profligate, imaginative, and violent". Sounds like most of the feudal lords of the day. Unpublished primary and secondary sources are used along with a host of published sources. [Given in a selected bibliography pp. 325 - 335.] The sources are not tied to the text.
At any rate, the text is an interesting account of the times, and gives much detail of the drama involved.
The book is published by Thomas Dunne Books, St. Martin's Press, NY, 2006. Anyone interested in reading about this "feudal lord, governor of Ireland, rebel leader, and a dictator of England" this book is for you. But of course, you will have to decided if Sir Roger is indeed "The Greatest Traitor".