Knock Knock Coupons & Free Shipping Codes

Founded in 2002, Knock Knock creates design-driven books and gifts involving wit, wordplay and conceptional thought. They offer everything from humorous sticky notes to volumes of thoroughly researched non-fiction that is never dumbed down. While Knock Knock delivers to countries outside the United States, the following free shipping codes only apply to the 48 contiguous states. Without a code, shipping rates are based on destination, weight of the order, and type of address.