Michael D. Whinston

This is the standard reference textbook in advanced microeconomics (graduate level). It covers all you need in graduate school. Nowadays economics is pretty mathematical, so you must have a good background in calculus - the mathematical appendix will give you the tools you need, but it is going to be impenetrable if you don't have a solid quantitative training. So this book is not suited to self study (unless you are extremely dedicated).
Ideally you would tackle all of the exercises - so good to have also [b:Solutions Manual For Microeconomic Theory: Mas Colell, Whinston, And Green|315021|Solutions Manual For Microeconomic Theory Mas Colell, Whinston, And Green|Chiaki Hara|http://www.goodreads.com/assets/nocover/60x80.png|305857] handy.

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