Mass spectrometry is one of the few techniques by which an organic compound can be uniquely identified. This book is dedicated to the interpretation of mass spectra of organic compounds at a level appropriate to undergraduates and graduates. It is organized into chapters of organic compounds. Consequently it is very much a compound-related approach to interpretation of mass spectra. The book is written at a level suitable for 2nd/3rd year undergraduates and offers a functional group approach to mass spectral interpretation with each chapter dedicated to different class of organic compound, providing structure, clarity and ease of reference. Containing over 120 representative spectra, it is in a easy-to-read style which should appeal to persons new to this particular discipline.