Explore the fascinating world of number theory with this 4-DVD set from The Great Courses. Taught with expert insights from Prof. Edward B. Burger of Williams College. The set includes a box set with 4 DVDs, each providing an in-depth understanding of number theory and a Course Guidebook. DVDs and Guidebook are clean and Very Good. A Nice Set. Please see photos of actual items for more details. Ships fast, same or next day by USPS Media Mail.