Bioorganic and bioinorganic chemistry are two leading disciplines at the interface of chemistry and biology. Now there is an increasing number of both chemists and biochemists who are studying simple synthetic molecules as models of enzymes. Molecular recognition is an important concept on which these research efforts are based. Supramolecular chemistry based on noncovalent intermolecular forces has provided most important innovations in organic, inorganic and biochemistry in the recent past. The award of Nobel Prize in chemistry for 1987 to D.J. Cram, J.M. Lehn and C.J. Pedersen reflects the importance of topics mentioned above. Keeping the significance of these areas in mind, UGC has introduced these topics in the model curricula for Indian Universities at the postgraduate level. This edition is meant to serve as a teaching textbook which is a blend of major and more important concepts of bioorganic, bioinorganic and supramolecular chemistry. The book is carefully designed to cover topics of the UGC model curricula providing up-to-date information with the following features: Basic principles from across the chemistry are added. Most of the background knowledge is accessible to students without a need to go back to texts on chemistry/biochemistry. The book is written with students in mind and provides material as per the UGC curricula in a clear and straightforward and simple style.