The Freud/Jung Letters: The Correspondence between Sigmund Freud and C.G. Jung is a comprehensive collection of letters exchanged between these two influential figures in the field of psychology. Published by Princeton University Press in 1974 as part of the Bollingen Series, this textbook offers insights into the dynamics of their professional relationship and the development of their respective theories. With a total of 732 pages, this edition provides a detailed exploration of the pioneering ideas and advancements in psychology made by Freud and Jung through their written correspondence.