This is a preassembled package of Organic Chemistry: Principles and Mechanisms (978-0-393-63074-9) and Organic Chemistry: Principles and Mechanisms: Study Guide/Solutions Manual (978-0-393-65555-1). Organic chemistry can overwhelm students and force them to fall back on memorization. But once they understand how to use mechanisms, they can solve just about any problem. With an organization by mechanism, students will understand more, and memorize less. The Second Edition of this groundbreaking text provides a fresh, but proven, approach to get students confident using mechanisms.