The aim of this 3GE Collection on Mechanisms and Catalysis in Organic Chemistry is to provide a comprehensive understanding of the fundamental principles of organic reactions and catalysis. The book covers a broad range of topics, including reaction mechanisms, stereochemistry, and the role of catalysts in organic reactions. The content is carefully organized to provide a logical progression of concepts, starting with an introduction to the basics of organic chemistry and building up to more complex topics such as pericyclic reactions and organometallic chem-istry. One of the main goals of the book is to help students develop a deep understanding of the underlying principles of organic reactions, rather than simply memorizing reactions and mechanisms. The material is presented in a clear and concise manner, with numerous examples and practice problems to reinforce key concepts. Another important aim of the book is to provide a solid foundation for students planning to pursue further studies in organic chemistry or related fields. The book not only covers the basics of organic reactions but also covers advanced topics such as enzyme catalysis and asymmetric catalysis, making it a valuable resource for students at all levels.