Note: You are purchasing a standalone product; MasteringGeology does not come packaged with this content. If you would like to purchase both the physical text and MyLab/Mastering search for ISBN-10: 0321934539 / ISBN-13: 9780321934536. That package includes ISBN-10: 0321934520 / ISBN-13: 9780321934529 and ISBN-10: 0321943422 / ISBN-13: 9780321943422. MyLab/Mastering is not a self-paced technology and should only be purchased when required by an instructor.