Organic Synthesis: The Disconnection Approach is the long-awaited second edition of a classic textbook, the first to provide a structured course in retrosynthesis- now an important technique used by generations of organic chemists. Now fully revised and updated with a modern look, 25 years of advances in organic synthesis are reflected with the addition of new examples and synthetic pathways. Additional material has been added to take the student to the level required by the bestselling sequel, "Organic Synthesis: Strategy and Control" and the later chapters have extensive new material based on courses that the authors give to chemists in the pharmaceutical industry.