The book "Singularity and Narcissism: The Psychology of the Self in the Works of Jung and Coht" by Mario Jacobi... This book not only explains one of the most important theories of psychoanalysis, but also goes back in time to study the emergence of "narcissism" and how to deal with it. It also sheds light on the dispute that arose between Jung and Freud, when Jung adopted his own ideas and rejected many of Freud's ideas.