This is the corresponding workbook to the extraordinary textbook which presents tools, methods and models for the understanding organic reactions. It helps to answer questions like "Why is a reaction possible?" or "What reaction products can I expect?". Written by two international highly renowned experts, this textbook is not only a resource for graduate students, PhD student and postdocs, but also for chemists and chemical engineers who develop new reactions and procedures. By using the corresponding workbook numerous questions and answers are offered to the reader to get a better understanding of the field, too.