Standby for 125 Code-Cracker puzzles that will get your brain into gear. Did you know that research has shown the mind and memory can be kept healthier and sharper by mental exercise such as puzzle solving, so Code-Cracker has got to be good for your health! Happy puzzling! Shipping: $8 per book. We are happy to combine shipping for multiple purchases, but this may increase the shipping price - please ask us for a quote before purchasing.