Before you purchase, check with your instructor or review your course syllabus to ensure that your instructor requires WileyPLUS. If your course ID starts with an "A" your class is using the next generation of WileyPLUS. This packages includes a loose-leaf edition of Principles of Anatomy and Physiology, 15th Edition, a registration code for WileyPLUS (next generation), and 12 months access to the eTextbook edition as part of the course (accessible online and offline).