A leading Polish philosopher of the 20th century, Roman Ingarden is principally renowned in Western culture for his work in aesthetics and the theory of literature. Jeff Mitscherling demonstrates, in this extensive work, how Ingarden's thought constitutes a major contribution to the more fundamental fields of ontology and metaphysics. Unparalleled in existing literature, Mitscherling's comprehensive survey of Ingarden's philosophy will give the reader an informed introduction to this major work of phenomenological analysis.