Quantum particles (ideas and principles of quantum solid state physics). M. and . Kaganov, I. M. Lifshitz . Main edition of the physico-mathematical literature , 1976. Brochure written by major experts on quantum theory of solids . It is intended for a wide range of readers .. In the brochure there are no mathematical formulas and conclusions . The authors build the whole presentation on analogies, assuming that the readers have a physical flair. From the brochure you can learn how atomic particles move in solids, what is hidden behind the term thermal motion and how the nature of the movement of atomic particles pro-, is in the macroscopic properties of solids.