Join the 999 Discount BookClub as a Free Member and enjoy 10 % off your orders of $10 or more whenever you shop. Your discount code is delivered to you via email when you join the MPS999 Bookclub. Use the form below to join. We will also keep you updated as new titles are added to the store, on monthly Bookstore Specials, Clearance Sales, Discount items and more. Please enter your best email above to start saving today.