We recognize that humor, comedy and laughter are important aspects of behavior, but ha been "hardly even mentioned" in the literature of psychology. It is recognized as a significant phenomenon, but is given little mention, and the literature that exists on the topic is scattered, superficial, and incongruous.

The author's task, in writing this book, was to integrate this material, sift out some of the more specious notions, and organize it into a consolidated, consistent, and plausible theory. His intent was to develop the material as a textbook for university instruction, mainly in support of the courses that he teaches on the topic that will convince budding psychologist of the value - to provide a starting point and a reference for further exploration.

(EN: The rest of the preface describes the approaches he took, other disciplines he included, the manner in which it is organized, etc. Since there is an introductory chapter, there's not much meat in the preface.)