Summary: Principles of comparative law
This is a good summary of comparative law. It includes links and references to relevant books as well as a descriptive analysis of the differences between the laws around the world. It focuses on the difference between civil and common law traditions but also mentions different cultures/ religions that influence legal systems such as Hinduism and Islam. It is a brilliant document to revise from or to just get a detailed understanding about the nature and methodology of comparative law today and how it works as a new area of study.