This book investigates the core question of what it is like to experience depression from a phenomenological perspective. Matthew Ratcliffe, a professor of philosophy, utilizes a framework rooted in continental philosophy and phenomenology to analyze the subjective nature of depressive states. By integrating patient accounts with philosophical inquiry, he argues that a deeper understanding of the lived experience of depression is necessary to improve psychiatric diagnosis, classification, and clinical treatment.

Experts in philosophy and psychiatry frequently cite this work as a foundational text for bridging the gap between subjective patient experience and clinical practice. Readers often note the academic density of the prose, which requires a strong background in philosophical terminology to fully grasp the arguments presented.