Logotherapy and Existential Analysis, the "Third Viennese School of Psychotherapy," was developed by Viktor Frankl and first published in 1938. It regards the search for meaning as the primary human motivation. Since persons are capable of deciding, they are also responsible for their decisions. A human being is not a mere puppet of biological, hereditary and environmental forces, but is always free to take a stand toward inner conditions and outer circumstances. It is the objective of the psychotherapy based on this anthropological view to accompany the clients on the way to finding possibilities for concrete meaning in their respective life situations. Logotherapy offers help at re-orientation and recovery by strengthening trust in the unconditional meaningfulness of life and the dignity of the person. Logotherapy and Existential Analysis has been internationally recognized for decades as an empirically supported humanistic school of psychotherapy. Evidence for the growing significance of logotherapy includes institutes, societies and professorships in many countries of the world, as well as conferences and publications. On the Theory and Therapy of Neuroses: An Introduction to Logotherapy and Existential Analysis, the translation of Frankl's Theorie und Therapie der Neurosen by James M. DuBois, will allow for the first time English-only readers to experience this essential text on logotherapy.