The new Costco Coupon book runs June 13-July 7th.
These are all prices from my store so you may find some variation at your store.
These books come in the mail or you can often find them at the customer service desk in store.
For the items listed as instant discounts there is no coupon needed. The items listed as Costco coupons, you just need to scan the booklet at checkout and all the coupons will come off. (There is no need to actually cut coupons.) Typically the cashiers will automatically do this for you.
Here are the top 10 deals I see this month:
You can see the complete list of Costo Coupon Book deals here.