This book is intended to serve as a textbook for undergraduate courses on strength of materials or mechanics of materials. Written in a clear and student friendly manner, this book presents a comprehensive yet concise coverage of the subject matter. The book is simple and easy to understand, includes a large number of solved problems, representative diagrams, and an extensive number of questions in exercise. It can be used in classroom teaching or self-study. The large number of end-of-chapter problems also make this book useful for students preparing for admissions and entrance exams. The book can be used for strength of materials courses across mechanical, materials, industrial, civil and aerospace engineering disciplines.