Writing a dictionary is an audacious undertaking. To capture the way words are used and what they are designed to mean, the descriptive role of the lexicographer, is a bold enough task. To indicate how they should be used, the prescriptive function, goes beyond boldness and inevitably invites retort. Yet, as Elizabeth L. Auchincloss and Eslee Samberg note in their masterful history of lexicography—which constitutes a major part of the introduction to their book Psychoanalytic Terms and Concepts—the descriptive and prescriptive are part of every dictionary’s aim, whether overt or covert. As these editors note, the prescriptive, along with the choices that determine what to include descriptively, the word, and in this case the concept list, inevitably constitute a quasipolitical agenda: to affect the field of inquiry addressed. In contrast to Freud, who thought that with patients he “should show them nothing but what is shown to him” (1)—a perspective, by the way, long since abandoned as a naive take on therapeutic relatedness—Auchincloss and Samberg are up front about the impact on the choices they have made of their theoretical commitments as contemporary North American ego psychologists. For them, ego psychology is the preferred psychoanalytic theory from which they view other perspectives as additive and in certain instances “corrective.” That said, they envision their audience as ranging from student to expert, as multidisciplinary in composition, and as encompassing diversity of allegiance to different models of theory and therapeutics. In this hybrid dictionary/encyclopedia, they aim to explicate terms and concepts in a manner in keeping with the volume’s three predecessors, edited by Burness Moore and Bernard Fine, with the first edition published in 1967 as A Glossary of Psychoanalytic Terms and Concepts, under the sponsorship of the American Psychoanalytic Association. Each term in the current book begins with a brief definition, followed by an explanation/exploration of the role and significance the term or concept has had for psychoanalytic thought and practice. Next comes, in most instances, the virtually obligatory nod to the origin of the term or idea in Freud’s work, followed by a brief summary of its historical development since its first appearance. Lastly, there is a thoughtful and fair-minded exploration of controversies regarding contemporary meaning and usage, referenced to provide a starting point for users to commence a more in-depth investigation of the subject at hand.