Microeconomic Theory by Andreu Mas-Colell, Michael D. Whinston and Jerry R. Green is the standard US graduate level mainstream economics textbook. The book has 5 parts: Part I: Individual Decision-Making; Part II: Game Theory; Part III: Market Equilibrium and Market Failure; Part IV: General Equilibrium; Part V: Welfare Economics and Incentives individual decision theory. The book provides a rigorous (mathematical) and lengthy (nearly 1000 pages) treatment of the standard microeconomic theorems and their ‘’proofs’’. [1][2]