The Language of Change is an innovative new introductory textbook that blends reform and traditional approaches with a focus on understanding calculus as its own language. With accessible writing and presentation, the book allows students to gradually understand the language -- first by reviewing vocabulary, and then quickly moving to present calculus conceptually, computationally, and theoretically. Within this framework, derivatives and integrals are developed side-by-side, coverage of theory is offered at various knowledge levels, and computing devices are incorporated generically. The text features seamless integration between chapters and numerous cross-disciplinary examples and applications, which gives instructors flexibility for shaping their course. A full range of student and instructor resources make Calculus: The Language of Change an outstanding course package.