This fourth edition focuses on the basics and advanced topics in strength of materials. This is an essential guide to students, as several chapters have been rewritten and their scope has expanded. Four new chapters highlighting combined loadings, unsymmetrical bending and shear centre, fixed beams, and rotating rings, discs and cylinders have been added. New solved examples, multiple choice questions and short answer questions have been added to augment learning. The entire text has been thoroughly revised and updated to eliminate the possible errors left out in the previous editions of the book. This textbook is ideal for the students of Mechanical and Civil Engineering.