This rigorous, up-to-date text on modern microeconomic theory presents all of the core mathematics, neoclassical theory, game theory, and information economics needed to access the modern professional literature. Complex theory is patiently and carefully developed, then clearly explained and illustrated because even well-prepared students benefit from additional math help. Careful explanations, efficient theorem-proof organization, and many examples and exercises make this a uniquely effective text for advanced courses. Students will appreciate the clear writing and accessible style.