The main characteristic of this now classic exposition of the inverse
scattering method and its applications to soliton theory is its
consistent Hamiltonian approach to the theory. The nonlinear Schrödinger
equation, rather than the more usual KdV equation, is considered as a
main example. The investigation of this equation forms the first part of
the book. The second part is devoted to such fundamental models as the
sine-Gordon equation, Heisenberg equation, Toda lattice as well as the
classification of integrable models and the methods for constructing
their solutions.