How does brain activity give rise to sleep, dreams, learning, memory, and language? Do drugs like cocaine and heroin tap into the same neurochemical systems that evolved for life's natural rewards? What are the powerful new tools of molecular biology that are revolutionizing neuroscience? This undergraduate textbook explores the relation between brain, mind, and behavior. It clears away the extraneous detail that so often impedes learning, and describes critical concepts step by step, in straightforward language. Rich illustrations and thought-provoking review questions further illuminate the relations between biological, behavioral, and mental phenomena. With writing that is focused and engaging, even the more challenging topics of neurotransmission and neuroplasticity become enjoyable to learn. While this textbook filters out non-critical details, it includes all key information, allowing readers to remain focused and enjoy the feeling of mastery that comes from a grounded understanding of a topic, from its fundamentals to its implications.