Creation to Marie Curie follow science as it unfolds. This set includes all five textbooks with their helps & hints at a $25 discount. Textbook titles are Science in the Beginning Science in the Ancient World Science in the Scientific Revolution Science in the Age of Reason Science in the Industrial Age Plus all of the Helps & Hints books The ISBNs included are 978-0-9890424-0-6 978-0-9890424-1-3 978-0-9890424-2-0 978-0-9890424-3-7 978-0-9890424-4-4 978-0-9890424-5-1 978-0-9890424-6-8 978-0-9890424-7-5 978-0-9890424-8-2 978-0-9890424-9-9Payment: Payment is expected within 5 days of auction’s end. You can contact us by phone at 731-610-9182 to make a payment with credit card. Shipping: We ship Monday through Friday and most Saturdays. Shipments are usually made the SAME DAY if payment is received by noon (Eastern Time); NEXT DAY if received after noon. Feedback policy: We work very hard to provide you with the BEST prices, FASTEST shipping and excellent customer service. If there are any issues with your purchase, please contact us before leaving feedback. Refunds: You can return your purchase within 14 days of receipt for a full refund minus original shipping charges. If the item is defective we will replace it free of charge or give you a full refund including shipping. Opened software, Electronics, Audiobooks, CDs and DVDs are not returnable unless defective. About us: We are a family owned company located in Denver PA. Everyone of our children is homeschooled, and most of the items that we sell we have used personally and found them to be a blessing, and trust you will too. We will readily admit that we aren’t the biggest or fanciest homeschool / Christian supplier but we strive to offer outstanding service & the highest quality products at the lowest possible price. You the customer are # 1! We appreciate the thousands of customers we’ve had the privilege to serve over the past few years and look forward to thousands more in the coming years.