A young Indian boy named Pi Patel survives a shipwreck and finds himself adrift in the Pacific Ocean on a lifeboat with a Bengal tiger named Richard Parker. Over the course of 227 days, Pi uses his knowledge of animal behavior and survival skills to coexist with the tiger, ultimately leading to an unusual and deeply spiritual journey. The story explores themes of faith, survival, and the interpretation of reality.

The book is a comprehensive exploration of human understanding and cognition from a philosophical perspective. It delves into the nature of knowledge, the process of knowing, and the dynamics of inquiry and learning. The author presents a detailed analysis of the human intellect and its operations, investigating the role of insight in decision-making, problem-solving, and discovery. The book also discusses the relationship between understanding and other cognitive faculties such as perception, memory, and imagination, while examining the impact of cultural, social, and historical factors on human understanding.