"Essay on a trial by jury" is a book by the revolutionary political philosopher and lawyer Lysander Spooner. In his work, the author reasoned and passionately argues for the uniqueness and importance of the institution of the jury in the legal system. Covering the history of the jury trial and its role in delivering justice, Spooner defends the principles of fairness, independence and democracy. The book "Essay on Jury Trial" became a classic work in the field of jurisprudence and legal philosophy, inspiring many readers to study important aspects of the judicial system.