'Umar bin Khattab (R) is one of the great Companions of Prophet (S) and second Caliph of Islam. He was so firm in his practice of Islam that he usually could make out what was right or wrong before the Prophet (S) had informed others of it. He used to say his friends: 'If a mule stumbles near the Euphrates River, I fear being questioned by Allah as to why I had not paved the road for it.'
This book throws light on the life and struggle of the greatest example of a just ruler. A true Muslim should follow the footprints of Umar bin Al-Khattab to uphold righteousness in every walk of our life.
Other Sources:
The fundamentals about Islamic religion