From previous editions: 'An excellent book for learning the basics of neutron scattering, which in the process teaches much about modern methods of quantum theory applied to condensed matter. Squires provides the simplest and most concise treatment of this material I have ever seen.' Jerry Mayers, ISIS, Rutherford Appleton Laboratory '... this is a theoretical book, welcome on the shelves of experimenters of thermal neutron scattering, and physics, chemistry and material science libraries in universities and research institutes.' Hagai Shaked, Acta Crystallographic