The book is aimed at constructing a system of concepts for linguistic morphology. In a rigorously deductive way, these concepts are applied to the description of morphological phenomena of about 100 languages. The chapters are dedicated to such issues as grammatical case, voice, morph vs. morpheme, morphological processes, agreement and government, phonemization. Being metalinguistically oriented, the book is strongly anchored in typological studies and offers a number of descriptive case studies.