Applauded for providing the most clear and accurate presentation of advanced microeconomic concepts, Walter Nicholson brings us Microeconomic Theory: Basic Principles and Extensions, 8e . The text offers an ideal level of mathematical rigor for upper level undergraduate students and beginning graduate students. It gives students the opportunity to work directly with theoretical tools, real-world applications, and cutting edge developments in the study of microeconomics. Reviewers exclaim, Nicholson's text is solid, rigorous and comprehensive. It is sensibly challenging for students, best serving students with a mathematics background, and absolutely essential for those who are preparing for graduate studies in economics.