Choose "Book" from the drop-down menu that says "Material Type" by clicking on it. You should enter the following codes in the "Search For Text" box: 997956 for book 1, 998265 for book 2, and 998449 for book 3! After that, add to the cart, enter 1 in the quantity field, and finally check out on the right side of the page.

Ordering your complimentary copies should be done quickly since these never stay in stock for long.