If you have purchased any of our puzzle books before, you can redeem your bonus by entering your code below. Send us your purchasing receipt to info@brainbustersbooks.com to get the code. Once your code is verified, you’ll be able to download your bonus puzzle books. If you have any trouble redeeming your code or downloading your bonus, please don’t hesitate to contact our customer support team for assistance. Thank you for your continued support, and happy puzzling!