Rodney Baxter\\\'s classic book has been cited over 2,500 times. The book is officially out of print. Contents: basic statistical mechanics; the one-dimensional Ising model; the mean field theory; Ising model on the Bethe Lattice; The Spherical Model; Duality and Star Triangle Transformations of Planar Ising Models; Square-Lattice Ising Model; Ice-Type Models; Alternative Way of Solving the Ice-Type Models; Squared Lattice Eight-Vertex Model; Kagomé Lattice Eight-Vertex Model; Potts and Ashkin-Teller Models; Corner Transfer Matrices; Hard Hexagon and Related Models; Elliptic Functions. |