Here are the details:
- Add at least 4 eligible items to your Amazon Shopping Cart. Eligible items will have a message such as "This item is eligible for our 4-for-3 promotion." on the product detail page. Eligible products include select books and Home & Garden items. You may include items from different product categories in a single order to qualify--for example, you can order an eligible book and an eligible kitchen item.
- Proceed to checkout. When you're done shopping on the Amazon site, click the "Proceed to checkout" button in the Shopping Cart. Your shopping cart should include at least four qualifying items during the checkout process to qualify for this promotion. Additional conditions are listed on the Amazon site.
- On the final checkout page, Amazon will discount the lowest-priced item. A promotion credit for the amount of the lowest-priced item will appear in the upper right corner of your Order Summary during the checkout process. If you use 1-click ordering, the promotion will be automatically applied.