Contents: Preface. 1. Introduction to spectroscopy. 2. Infra-red spectroscopy. 3. Electronic spectroscopy. 4. Nuclear magnetic resonance (NMR) spectroscopy. 5. Mass spectrpscopy. 6. Electron spin resonance spectroscopy. 7. Photoelectron spectroscopy. Bibliography. The book is written to give the learners the basic concepts of spectroscopy. In this book seven chapters are included which deals with introduction to spectroscopy, infra-red spectroscopy, electronic spectroscopy, NMR spectroscopy, mass spectroscopy, ESR spectroscopy and PES.