It is a comprehensive guide to important characters and places and institutions and much more. The Reader's Guide includes brief but comprehensive alphabetical entries on a wide range of topics, including a who's who of important persons, a guide to places and institutions, details concerning Tolkien's source material, information about the political and social upheavals through which the author lived, the importance of his social circle, his service as an infantryman in World War I -- even information on the critical reaction to his work and the "Tolkien cult."