"Commentaries on the Laws of England" is a book written by William Blackstone, an English jurist, judge, and politician. The book was first published in the 18th century and became one of the most influential legal treatises in English history. It is divided into four volumes and provides a comprehensive overview of English law, including the history of the legal system, the principles of property law, criminal law, and civil law.

The book is notable for its clear and accessible writing style, which made it widely accessible to non-lawyers and helped to popularize the study of law. It also played a key role in shaping the development of the American legal system, as it was widely read and studied by American lawyers and judges in the early years of the United States.

Blackstone's "Commentaries" is still considered a foundational work of English law and legal philosophy, and its influence can be seen in the legal systems of many other countries around the world. The book is also valued for its historical significance, as it provides a detailed record of the legal system in England during the 18th century and the social and political forces that shaped it.