Artificial Intelligence: A Modern Approach, Third Edition by Stuart Russell and Peter Norvig is a comprehensive textbook covering the theory and practical foundations of Artificial Intelligence. It explores intelligent agents, problem-solving and search, logical reasoning, knowledge representation, probabilistic reasoning, machine learning, reinforcement learning, natural language processing, computer vision, robotics, and AI planning. The book presents AI through an agent-based approach, combining theoretical concepts with algorithms, examples, and exercises.