Welcome to your one-stop shop for Costco coupons and the latest deals from the monthly Costco Coupon Book! If you have a Costco membership, you probably know that Costco prices beat most competitors including Walmart and Amazon. At KCL, we not only report on monthly Costco coupons, including providing the best deals, but we've curated the top insider shopping tips about the best things to buy at Costco, sneaky ways Costco gets you to spend too much, and how to shop Costco without a membership.