This book discussed the intrapsychic implications of anxiety. It draws much of its analysis on the phenomenon of anxiety from the philosophical (specifically Kierkegaard's), psychoanalytic, and cultural perspectives. I consider it to be a reflection of May's orientation, which is geared towards the Existential-psychoanalysis school.
Although it focused much of its discussion on the origins and implications of anxiety, the most important part of the book is its proposal on how to use anxiety constructively towards personal growth instead of allowing it to be a liability.