This book is designed for both undergraduate and postgraduate students in Indian universities and also aspirants of competitive exams seeking an in-depth understanding of the principles of organic chemistry and mastering the art of organic synthesis. The apparent difficulty in grasping synthetic organic chemistry can be traced back to predicting the reactivity of organic molecules. The authors have taken utmost care to discuss this predictability issue in the organic synthesis using a more holistic approach with the help of mechanistic details of the bond-breaking and bond-forming reactions. Many examples have been provided for each concept and synthetic transformation for clearing up doubts and installing confidence in readers. Key features: Mechanistic insights of major carbon-carbon bond forming and bond cleaving processes Focuses on understanding the reactivity patterns of organic molecules and predicting reaction outcomes based on the core principles Enables the reader to choose the suitable reagent and conditions to form the desired product selectively. Includes a large number of examples and solved problems for a better understanding of the concepts.