When analyzing the structure of a country's legal system, you are generally trying to answer two questions:
There are a number of useful resources that can be consulted to answer these two questions.
There are a number of useful resources for determining the type of legal system for a given country. Furthermore, many works provide in-depth analysis of the features of legal systems.
There are many in-depth treatises that examine different types of legal systems in general as well as the given type of legal system in place in specific countries. Several of the major treatises in this area are listed below. Consult the "World Legal Systems Web Site: General Bibliography" for an extensive listing of articles and books addressing this topic.