K.C. John is Professor and Head, Department of Mechanical Engineering, Jyothi Engineering College, Cheruthuruthy, Thrissur, Kerala. He has more than 40 years of teaching experience including overseas assignments. Professor John is a Fellow member of the Institution of Engineers (India) and Indian Society for Technical Education (ISTE). He is the author of several books. His books titled Textbook of Machine Drawing, Engineering Graphics for Degree, Engineering Graphics for Diploma and Mechanical Workshop Practice have been published by PHI Learning, Delhi.