Lewis Aron's important book is several things at once. It is a historical narrative of the relational approach as it came into life in the New York University postdoctoral program. It is an appeal to classical analytic thinkers who have changed their views about the analytic procedure to acknowledge and relate to the corpus of interpersonal writing. It alludes to the author's Odyssey, which set sail with a Freudian training until reaching affinities of choice in the interpersonal tradition, silently documenting his experience and ways of working as a clinician. The book is also a strong articulation of relational thinking, where the concept of mutuality is foregrounded and systematically elaborated. Aron's whole way of writing is intensely relational: He relates to origins, other theories, social and cultural streams, and colleagues. There is a strong sense of a polylogue, with numerous addressees in a lively interchange. The book is an amalgam of history, evolution of ideas, arguments and counterarguments, and evolving forms of accepted terms and ideas with which Aron carefully maps out