Since its publication in 1958, Existence has been regarded as the most important, complete and lucid account of the existentialist approach to psychology. From the works of the leading spokesmen of the existential analytical movement, the editors have selected classic case histories and other writings to define the new approach which seeks to understand mental illness, in the words of Rollo May, "...not as deviations from the conceptual yardstick of this or that psychiatrist...but as deviations in the structure of the particular patient's existence, the disruptions of his condition humaine."

(From Goodreads)