This book is not a biography of Omar bin Al -Khattab, nor a date for his era on the pattern of dates that mean accidents and news, but he described him and a study of his phases, and an indication of the characteristics of his greatness, and the benefit of these characteristics of psychology, ethics and the facts of life .. If our understanding of the genius of such a personality It is an antidote from the disease; That is why the writer dealt with the personality of Omar through his characteristics and Islam, and Omar as a state man and his impact on the Islamic government and his relationship with the noble Messenger "may God bless him and grant him peace", his culture and his relationships with his companions and in his home.