To describe the contents of this book in just a few words I can't do better than to quote from the front flap of the black and white version of the dustwrapper:
"The Study of lichens is a fascinating subject and in this book the authors have sought to provide an introductory volume for the layman, teacher and student, as well as a handy reference book to the subject. The book fully covers the structure and reproduction of lichens together with the methods of collecting and examining. Also included are explanations of technical terms to help the reader. These terms have been gathered into a glossary for easier reference and there is a key to the identification of the genera.