The book "Relationship of Various Occlusal Landmarks to the Occlusal Plane" by Rubina Gupta provides a comprehensive investigation of the relationship between anatomical landmarks and the occlusal level in natural dentition. It aims to analyze the consistency of these landmarks in determining the occlusal level in complete dentures and to identify possible variations between genders. The landmarks studied include the Camper's plane, the interpupillary line, the buccal linea alba, and the retromolar pad. The results indicate that the occlusal plane is generally parallel to the Camper's plane, but not to the interpupillary line. These findings are particularly valuable for dentists working with edentulous patients and offer practical approaches for application in clinical practice.