Author copies are already at subsidized costs (at production cost + delivery) to ensure our authors can get copies at affordable prices therefore, we don't offer discounts on top of the already low prices. However, you can purchase copies at a discounted price during the Super Saver Week - a 7 day period where you can get discounts on an order of 10 or more. Please stay tuned to your email to know when the next Super Saver Week is announced.