The Joy Of Set: The Many Mathematical Dimensions Of A Seemingly Simple Card GameMcmahon, Liz, Gary Gordon, Hannah Gordon, Rebecca Gordon $19.95
The Calculus Of Happiness: How A Mathematical Approach To Life Adds Up To Health, Wealth, And LoveFernandez, Oscar E. $16.95
Unsolved! The History And Mystery Of The World's Greatest Ciphers From Ancient Egypt To Online Secret SocietiesBauer, Craig P. $22.95
Math Adventures With Python: An Illustrated Guide To Exploring Math With Code ( No Starch )Farrell, Peter $29.95