Structural and engineering materials form the foundation of modern engineering, finding applications in buildings, machines, vehicles, and countless industrial products. Their strength, durability, reliability, and cost-effectiveness are critical factors in design, manufacturing, and long-term performance. A sound understanding of the behaviour of materials and solid mechanics is therefore essential for every engineering student. This book presents the fundamental principles of Mechanics of Solids in a clear and concise manner, supported by numerous worked examples and practical applications to help readers develop a strong conceptual understanding of the subject.