The book of selected works of the outstanding Soviet scientist academician Yakov Borisovich Zeldovich contains works on the theory of combustion and detonation, which have become classical and are the basis of the entire modern development of this field of chemical physics. The book also includes the most important works of the scientist in the field of adsorption theory, chemical thermodynamics, phase transition theory, heat transfer and diffusion theory, similarity theory, gas dynamics and magnetic hydrodynamics, shock wave theory. In an introductory article and commentary, the editorial board highlights the creative path of J. B. Zeldovich and shows the role and place of his work in modern science. The book is designed for scientific and engineering workers - physicists and chemists, graduate students and senior students.