Coupon books costing $25 or more and sold door-to-door or at any location other than the seller's normal place of business are considered to be home solicitation contracts and subject to a three-day cooling-off period. This means that if you change your mind about purchasing the book you have three days to cancel your transaction to obtain a refund. The coupon book should tell you this and include a form to use for cancellation. You will of course have to return the book in the same condition as you received it.