This undergraduate biological psychology textbook offers a critical introduction to brain and behavior. Psychology lectures open with 'the brain is the most complex and mysterious object in the universe', only to quickly reduce that complexity by teaching simplified models. This textbook challenges these narratives by focusing on the latest neurotechnological advances, to clarify the limits of current models, and to inspire the development of safe and accessible technologies for human use. Its central aim is to promote critical thinking and inspire students to pose novel research questions that build from current advances. It is an ideal textbook for instructors who are eager to push beyond a conventional introductory curriculum. Beautifully illustrated and full of practical applications, it is accompanied by teaching slides and a test bank.