The theory of machines is an important subject not only in the mechanical engineering discipline but also in other engineering disciplines. All products whether they are mechanical, electrical, civil, computers or electronic, are designed, manufactured and maintained by mechanicals only. This is one of the interesting and useful subjects which deals with mechanisms and machines. The book covers both the kinematics and dynamics of machines. The book will be useful not only for degree-level students of mechanical engineering but also to those preparing for AMIE and various other competitive examinations..