I am glad to present the Second Edition of the book entitled, ‘Mechanics of Solids’ to the engineering students of U.P. Technical University, lucknow. The course contents have been planned in such a way that the book covers the complete course of second year of B. Tech. Mech. Engg./Production Engineering/Industrial and Production Engineering/Mechanical and Industrial Engineering/Manufacturing Technology/Automobile Engineering and Aeronautical Engineering students of U.P. Technical University, Lucknow. During my long experience of teaching, I have observed that the students face difficulty in understanding clearly the basic principles, fundamental concepts and theory without adequate solved problems along with the text. To meet this very basic requirement of the students, a large number of the questions taken from different Universities have been solved along with the text in S.I. units at proper places.