The Legal Theory Bookworm recommends Interpreting Constitutions, a Comparative Study edited by Jeff Goldsworthy. Here is a blurb:
This book describes the constitutions of six major federations and how they have been interpreted by their highest courts, compares the interpretive methods that have guided the courts, and explores the reasons for major differences between these methods. Each of the six federations is the subject of a separate chapter written by a leading authority, which describes not only the interpretive methodology currently used, but the evolution of that methodology since the constitution in question was first enacted. The book also includes a concluding chapter that compares these methodologies, and attempts to explain variations by reference to different social, historical, institutional and political circumstances.
And here is a chapter list:
1. Introduction2. United States: Eclecticism In the Service of Pragmatism ,3. Canada: From Privy Council to Supreme Court ,4. Australia: Devotion to Legalism ,5. Germany: Balancing Rights and Duties ,6. India: From Positivism to Structuralism ,7. South Africa: From Constitutional Promise to Social Transformation ,8. Conclusions