**Summary:** This book provides a comprehensive and up-to-date treatment of classical and shear deformation plate and shell theories, along with their analytical and numerical solutions. The second edition includes new material and rearranged topics for improved clarity. The first 10 chapters are similar to the first edition, with additions and rearrangements. Chapter 11 introduces shell theory, while Chapter 12 covers finite element analysis of plates. The book is suitable as a textbook for courses in aerospace, civil, mechanical, and mechanics curricula. It also serves as a reference for engineers and scientists working with plate and shell structures. The book includes a solution manual for instructors. The author, J. N. Reddy, is a distinguished professor with extensive research in mechanics and computational mechanics. The book covers vectors, tensors, matrices, and equations of elasticity, with a focus on the application of energy principles and variational methods. It includes detailed discussions on plate and shell theories, including first-order and third-order shear deformation theories, and provides solutions for various boundary conditions and loading scenarios. The book also covers finite element analysis, including nonlinear finite element models. The text is well-structured, with clear explanations and examples, making it an essential resource for students and professionals in the field of structural mechanics.**Summary:** This book provides a comprehensive and up-to-date treatment of classical and shear deformation plate and shell theories, along with their analytical and numerical solutions. The second edition includes new material and rearranged topics for improved clarity. The first 10 chapters are similar to the first edition, with additions and rearrangements. Chapter 11 introduces shell theory, while Chapter 12 covers finite element analysis of plates. The book is suitable as a textbook for courses in aerospace, civil, mechanical, and mechanics curricula. It also serves as a reference for engineers and scientists working with plate and shell structures. The book includes a solution manual for instructors. The author, J. N. Reddy, is a distinguished professor with extensive research in mechanics and computational mechanics. The book covers vectors, tensors, matrices, and equations of elasticity, with a focus on the application of energy principles and variational methods. It includes detailed discussions on plate and shell theories, including first-order and third-order shear deformation theories, and provides solutions for various boundary conditions and loading scenarios. The book also covers finite element analysis, including nonlinear finite element models. The text is well-structured, with clear explanations and examples, making it an essential resource for students and professionals in the field of structural mechanics.