Introductory deal: Receive a free Mathmania book when you join the Mathmania Book Club from Highlights for Children. Your credit card will also be charged $4.49 plus $2.45 shipping and handling (total = $6.94) for the second book in the series. The 48-page books, which include number codes, math mazes, logic puzzles, arithmatricks and brainteasers that involve counting, sequencing, measuring, adding, subtracting, multiplying, dividing, telling time and other skill-building activities, are designed for readers ages 7 to 12. If you choose not to continue as a member, you can return the second book at the club's expense and a refund will be posted to your card. Then: If you continue as a member, every five weeks the club will send two new Mathmania books for $4.49 each plus $2.45 shipping (total = $11.43). And: That's it. You can cancel your membership at any time, or return any shipment of books you don't want. Shipping & handling: $2.45 per order. Order / decline online?: No. Credit card required? Yes (required to join). Sales tax: Illinois, Ohio, Pennsylvania, Wisconsin. Customer service: 800-316-4858. Open to: U.S. residents, including its territories and APO/FPO.