Wendy's has its 10 Jr Frosty for a $1 coupon book that is good from date purchased to end of Feb next year. Also theirs goes to a cause like March of Dimes I believe, so even more a reason to buy. (coupons one per customer)
Burger King normally comes out with a book that I believe is 10-12 small fries I really don't remember but they also have some kind of book that is also a dollar.
So if you have kids stock up cause its a huge money saver, Happy Halloween!