Book excerpt: This book provides a comprehensive overview of the basic and advanced metabolic engineering technologies used to generate natural metabolites and industrially important biomolecules. Metabolic engineering has the potential to produce large quantities of valuable biomolecules in a renewable and sustainable manner by extending or modifying biosynthetic pathways in a wide range of organisms. It has been successfully used to produce chemicals, drugs, enzymes, amino acids, antibiotics, biofuels, and industrially important pharmaceuticals. The book comprehensively reviews the various metabolites detection, extraction and biosensors and the metabolic engineering of microbial strains for the production of industrially useful enzymes, proteins, organic acids, vitamins and antibiotics, therapeutics, chemicals, and biofuels. It also discusses various genetic engineering and synthetic biology tools for metabolic engineering. In closing, the book discusses ethical, patenting and regulatory issues in the metabolic engineering of microbes. This book is a valuable source not only for beginners in metabolic engineering, but also students, researchers, biotechnology and metabolic engineering based company.