"To Think Fundamentals of Psychoanalysis" is a comprehensive non-fiction book that explores the foundations of psychoanalysis. The author, Rafael Cruz Roche, examines the discipline of psychoanalysis from various perspectives and sheds light on the debate about whether it should be regarded as a natural science or as a hermeneutic science. The book advocates for an integrative viewpoint that considers humans as biopsychosocial beings and emphasizes the necessity of a specific methodology and epistemological critique. It points out that psychoanalysts must be informed beyond psychological boundaries to understand the complexity of human behavior and experience. This well-founded analysis offers valuable insights for students, professionals, and anyone interested in the depth psychological aspects of human existence.