The book "Elastodynamic Diffraction Problems" by Y.-H. Pao and C.-C. Mow, published in 1973, explores the dynamic stress concentrations near cavities and inclusions, which can differ significantly from their elastostatic counterparts. The authors provide a comprehensive collection of analytical and numerical methods for solving elastodynamic diffraction problems, including extensive data on stress concentrations. The book begins with a historical overview of elastic wave diffraction studies and summarizes the theory of elasticity. It then delves into the analysis of wave scattering by cylindrical and spherical obstacles, covering both steady-state and transient diffraction. Specific topics include the diffraction of longitudinal and transverse waves by cavities and inclusions, the scattering of flexural waves by circular inclusions, and the interaction of shells with elastic media. The book also addresses stress singularities at the edges of semi-infinite cracks and spherical inclusion problems. This monograph is a valuable resource for researchers and engineers interested in elastodynamic effects. "Materials Science" by A. L. Ruoff, published in 1973, is an excellent introductory textbook suitable for engineers and students. It covers a wide range of topics in materials science, including material properties, behavior, atomic and molecular structure, chemical equilibria, kinetics, mechanical, electrical, optical, and magnetic properties. The book is well-written and includes numerous examples and problems, making it suitable for undergraduate teaching. It provides suitable references at the end of each chapter for further study.The book "Elastodynamic Diffraction Problems" by Y.-H. Pao and C.-C. Mow, published in 1973, explores the dynamic stress concentrations near cavities and inclusions, which can differ significantly from their elastostatic counterparts. The authors provide a comprehensive collection of analytical and numerical methods for solving elastodynamic diffraction problems, including extensive data on stress concentrations. The book begins with a historical overview of elastic wave diffraction studies and summarizes the theory of elasticity. It then delves into the analysis of wave scattering by cylindrical and spherical obstacles, covering both steady-state and transient diffraction. Specific topics include the diffraction of longitudinal and transverse waves by cavities and inclusions, the scattering of flexural waves by circular inclusions, and the interaction of shells with elastic media. The book also addresses stress singularities at the edges of semi-infinite cracks and spherical inclusion problems. This monograph is a valuable resource for researchers and engineers interested in elastodynamic effects. "Materials Science" by A. L. Ruoff, published in 1973, is an excellent introductory textbook suitable for engineers and students. It covers a wide range of topics in materials science, including material properties, behavior, atomic and molecular structure, chemical equilibria, kinetics, mechanical, electrical, optical, and magnetic properties. The book is well-written and includes numerous examples and problems, making it suitable for undergraduate teaching. It provides suitable references at the end of each chapter for further study.