"Happiness and Self-Efficacy" is a book rooted in positive psychology. Happiness is one of the most vital qualities of human's lives which has been a permanent concern in all cultures and religions all through the history. It is related to different factors such as personality, mental health, academic and job achievement, etc. Self-efficacy as the one's belief in his/her own abilities is one of the factors most related to happiness. The author of the text tries to explain this relationship based on theoretical frameworks and empirical evidence.