The last half century has produced an increasing interest in semiotics, the study of signs. As an interdisciplinary field, moreover, semiotics has produced a vast literature from many different points of view. As the discourse has expanded, clear definitions and goals become more elusive. Semioticians still lack a unified theory of the purposes of semiotics as a discipline as well as a comprehensive rationale for the linking of semiosis at the levels of culture, society, and nature. This short, cogent, philosophically oriented book outlines and analyzes the basic concepts of semiotics in a coherent, overall framework.