Logotherapy, Viktor Frankl’s existential-analytic system centered on the primacy of meaning as the fundamental human motivational force, occupies a distinctive and contested position within the depth-psychology corpus. Frankl’s own texts constitute the foundational stratum, advancing a tripartite architecture: the noölogical dimension of human existence, the will to meaning as irreducible to drive-theory or homeostatic models, and specific clinical techniques—most notably paradoxical intention—designed to interrupt the self-reinforcing cycles of anticipatory anxiety and hyperintention. The corpus reveals Frankl’s explicit polemic against Freudian and Adlerian reductionism, insisting that noögenic neuroses arise not from intrapsychic conflict but from existential frustration, and that the ‘existential vacuum’—depression, aggression, addiction—is the pathogenic precipitate of meaninglessness in modern culture. Yalom engages logotherapy with measured critical respect, crediting Frankl with placing meaning squarely before the clinician while questioning the hagiographic tenor of Frankl’s school and the degree to which the system constitutes a genuinely open therapeutic encounter rather than a directed imposition of the therapist’s values. Pargament situates logotherapy at the intersection of the search for meaning and religious experience, noting that the system’s spiritual dimension, while often implicit, resonates deeply with pastoral and religious coping frameworks. The Jungian corpus, represented here by Edinger, does not engage the term directly, marking a significant disciplinary boundary within the broader library.