This book comprehensively covers the fundamentals and latest advancements in the area of click chemistry. It discusses notable applications of click chemistry in various emerging areas ranging from chemical biology to catalysis and from medicinal chemistry to material sciences. Various topics covered in this book are catalysis in regioselectivity in click chemistry, organocatalysis in triazole synthesis, Bertozzi's Bioorthogonal Concept, photo-triggered click chemistry, SuFFEx Click, Thiol-Ene Click, MCR Click, Intramolecular Click Chemistry, synthesis of diverse triazoles and their applications, Click's Post Functionalization, etc. The book is a valuable reference for beginners, researchers and professionals interested in sustainable click concept and its diverse applications in allied fields.