This book investigates the complex optical phenomena in solids arising from spatial dispersion and the behavior of excitons. It delves into the theoretical framework required to understand how the wave vector of light interacts with the electronic excitations within a crystal lattice, moving beyond simpler models that assume spatial uniformity. The work aims to provide a comprehensive treatment of the subject, integrating concepts from solid-state physics and optics to explain observed optical properties.

This monograph is recognized as a significant contribution to the field of solid-state optics, particularly for its in-depth theoretical treatment of spatial dispersion and excitons. It is likely regarded as a foundational text for researchers and advanced students specializing in condensed matter physics and optical properties of materials. The detailed mathematical framework and comprehensive scope suggest it is a resource for those seeking a rigorous understanding of advanced optical phenomena in crystalline solids.