Please note: This is a new edition of a previously announced text. Geert Booij's popular textbook on the structure of words has been revised and updated in a third edition. The book covers every aspect of morphological theory and the analysis of words. It is the only introductory text to explore the role of morphology in language processing and language change, and also deals with the relation between morphology and other modules of grammar. The book includes a full glossary and exercises with answers.