Before you purchase, check with your instructor or review your course syllabus to ensure that you select the correct ISBN . Several versions of Pearson’s MyLab & Mastering products exist for each title, including customized versions for individual schools, and registrations are not transferable. In addition, you may need a CourseID , provided by your instructor, to register for and use Pearson’s MyLab & Mastering products. Packages Access codes for Pearson’s MyLab & Mastering products may not be included when purchasing or renting from companies other than Pearson; check with the seller before completing your purchase. Used or rental books If you rent or purchase a used book with an access code, the access code may have been redeemed previously and you may have to purchase a new access code. Access codes Access codes that are purchased from sellers other than Pearson carry a higher risk of being either the wrong ISBN or a previously redeemed code. Check with the seller prior to purchase. 0321641329 / 9780321641328 MasteringPhysics with Pearson eText Student Access Kit for Physics 4/e Package consists 0134023706 / 9780134023700 MasteringPhysics Content — Access Card Package Sales Accumulator — for Physics Technology Update 0321601947 / 9780321601940 MasteringPhysics” — Pearson eText Upgrade — for Physics —