Islam is a practical religion dealing with the warring traits of human nature and bending them to the Straight Path. It has discarded the law of the jungle, and the motto of might is right. The Islamic concept of justice is positive. It does not stop at the negation of the wrong but goes forward to promote the right so that there remains no incompatibility between the so-called justice and what is really just and equitable. The concept of Islamic justice does not permit prejudice against anyone. The Quranic Injunction is: "... and let not the hatred of any people seduce you that ye deal not justly ...." [TMQ Surah Maidah: 8] Under Islam, justice is the sum total of life. To do injustice is sinful. To suffer injustice calls for positive remedial action on the part of Muslims. Such action might mean even the supreme sacrifice of one's life for the sake of justice. This book is an English rendering of a popular Arabic book entitled Adab Al Qadi, Written by the renowned Muslim Jurist Imam Khassaf. In this book, the learned author has favored us with the basic principle of the Islamic judicial system and that of the Judiciary in the light of the Holy Quran and the Sunnah. The Learned Translator of this book Justice Dr.Muneer Ahmad Mughal, was himself a Judge of the Lahore High Court, Lahore. He has perfect hold on the subject and over both the languages.