Professor Ahmed H.Zewail, Nobel Prize winner in Chemistry, has the following to say in the Foreword'' to the book.This volume brings up to date the Chemistries and Chemists who in totality forged the field of chemistry; its principles, concepts and tools. In this respect, the book is unique and should stimulate concerned readers and young minds about discoveries and innovations in Chemistry and their impact in adjacent Sciences.

D N Dhar, PhD, FNASc, was Research Asso. at CalTech (USA), Exchange Scientist at Moscow (USSR) & London (UK). Currently, he is visiting Professor, at Rajeev Gandhi Institute of Petroleum Technology, Raebareli (India). Prof Dhar has over 150 published papers in Synthetic Organic Chemistry and Natural Products. Preeti Dahr, Asso Prof,SUNY,NY USA