You are required to either purchase or rent the Essentials of Dental Assisting textbook for the class. The workbook must be purchased and cannot be rented because you will be writing in it. Both ElSevier and Amazon offer a discount on a package bundle. ElSevier can take 3-4 weeks to ship, whereas Amazon offers faster shipping. You may purchase (or rent) your books elsewhere as long as it is the same edition used in the course.