"Geoffrey de Mandeville: A Study of the Age of Chaos" is a detailed analysis of the life and work of one of the key figures in English history - Geoffrey de Mandeville. The author of the book, John Horace Round, examines the period of English history known as the "Age of Chaos", when the power in the country was in doubt and the struggle for power was between the feudal lords and the king. The book offers the reader a unique view of the political and social events of the time, reproducing the complex relationships and intrigues that determined the further development of England. Thanks to the author's detailed research, the reader can better understand the essence and consequences of this dark period in the history of England.