Dr. Gurdeep R. Chatwal is widely known for writing several popular text books, monographs and encyclopedia on different aspects on chemistry, environmental science and pharmaceutical chemistry. He got his M.Sc. from Roorkee University (Now I.I.T. Roorkee) and Ph.D. from University of Delhi. At present he is working as Reader in Chemistry in D.S. College, University of Delhi. He had also taught in IARI, Pusa, New Delhi, M.M.H. College, Meerut University and S.G.T.B. Khalsa College, Delhi.