Fourteen years ago when Alan Fersht's Enzyme Structure and Mechanism was published, the field of protein engineering was in its infancy. Since then, spectacular advances in determining biological structure, manipulating genes, engineering proteins, sequencing whole genomes, and computing have led not just to an expansion of protein science, but to its utter transformation. We have entered a new era of protein design, sparked by the convergence of protein folding and enzymology. Fersht's Structure and Mechanism in Protein Science is a defining exploration of this new era, an expert depiction of the core principles of protein structure, activity, and mechanism as understood and applied today. A thorough recasting of Fersht's previous text, the book takes a more general look at mechanisms in protein science, emphasizing the unity of concepts in folding and catalysis and the importance of the relationships between basic chemistry, kinetics, thermodynamics, and structure. By concentrating on fundamental principles and the physical and chemical processes behind them, Structure and Mechanism in Protein Science makes the basic formulas, kinetics, and thermodynamics of protein engineering easier to understand and apply. Up-to-date, authoritative, and full with relevant examples, it provides a solid introduction to a sprawling, still-growing field.