The macromolecular biological catalysts which accelerate chemical reactions are known as enzymes. They are an integral part of most of the metabolic processes in cells. They are involved in the conversion of substrates into different molecules known as products. The study of enzymes is known as enzymology. It deals with the study of their kinetics, structure and function. Enzyme kinetics is a sub-field of enzymology which seeks to study the processes through which substrates are bound by enzymes and turned into products. Some of the other functions of enzymes which are studied within this field are signal transduction and cell regulation. Different approaches, evaluations, methodologies and advanced studies on enzymes have been included in this textbook. While understanding the long-term perspectives of the topics, it makes an effort in highlighting their impact as a modern tool for the growth of the discipline. The coherent flow of topics, student-friendly language and extensive use of examples make this book an invaluable source of knowledge.