F. Munoz-Garcia, Advanced Microeconomic Theory: an intuitive approach with examples. MIT Press, 2017.
G.A. Jehle and P.J. Reny, Advanced Microeconomic Theory, 3d edition, Addison-Wesley, 2011.
A. Mass Colell- M. Whinston and J. Green (1995) Microeconomic Theory, Oxford University Press
P. Bolton and M. Dewatripont (2005) Contract Theory, MIT Press
Other Useful Textbooks:
A. Deaton and J. Muellbauer (1980) Economics and Consumer Behavior. Cambridge University Press, 1980. An extensive coverage of demand theory.
H. Varian, Microeconomic Analysis, 3rd. ed., Norton, 1992. A shorter treatment of PhD-level microeconomic theory than the above two main textbooks.