The goal of this ongoing project is to write an introductory book on statistical
mechanics. As there are already many such books, both for physicists and
mathematicians, we believe it is important to describe what we aim to achieve.
Our plan is to write a book that is

Note [May 11, 2015]: Claudio Landim (IMPA) has recently given a course based on Chapter 3 (The Ising model). Videos of the lectures can be found here (see lectures 1 to 9); the lectures are in Portuguese.
Note [January 19, 2016]: One of us (Y.V.) has recently given a onesemester course, entitled Introduction to Statistical Mechanics, based on Chapters 3, 7, 8 and 10. Videos of the lectures (as well as other lectures in the same program) have been uploaded here.
Files
Warning: The chapters below are early drafts. As such, they are likely to contain mistakes and be incomplete (in case you find any mistake, or if you believe that some important topics are missing, please tell us!). Also, bibliographical information may be only partial, or even completely inexistent, depending on the stage of writing. We apologize in advance to all the people whose works are not (yet!) properly referenced.Table of contents (latest version: September 17 2015)
 Introduction (latest version: September 10 2015; in progress, still very incomplete)
 Mean field models (latest version: September 12 2015)
 The Ising model (latest version: October 21 2015)
 The liquidvapor equilibrium (latest version: September 12 2015)
 The cluster expansion (latest version: September 10 2015)
 Infinite volume Gibbs measures (latest version: December 17 2015)
 The Gaussian Free Field (latest version: December 17 2015)
 Models with continuous symmetry (latest version: November 9 2015)
 PirogovSinai theory
 Reflection positivity and applications
 Longrange Ising model
 The variational principle
 Mathematical appendices (latest version: September 17 2015; in progress, still very incomplete)
 Solutions to the exercises
 Bibliography
 Index