From the list on the real Middle Ages.
Who am I?
I am a historian primarily of western Europe in the eleventh and twelfth centuries. My leading interest has shifted over many years from the people who were persecuted as heretics at that time to their persecutors, as it dawned on me that whereas scepticism about the teachings of the Roman (or any) church was easily understandable, the persecution of mostly rather humble people who presented no real threat to that Church or to wider society was not, and needed to be explained.
R.I.'s book list on the real Middle Ages
Why did R.I. love this book?
The same transformation is vividly described, along with the enormities of archetypically immoral barons and revolting peasants, the murder of a scandalous bishop, and much else, in the memoirs of an abbot from northern France at a time of violent social upheaval and intense personal rivalries, often played out on the stage of religious piety. This is one of the liveliest and most revealing of the many sources translated from this period, excellently introduced by Jay Rubenstein.