{"product_id":"9781589796737","title":"Dead Reckoning: Calculating Without Instruments","description":"No author has gone as far as Doerfler in covering methods of mental calculation beyond simple arithmetic. Even if you have no interest in competing with computers you'll learn a great deal about number theory and the art of efficient computer programming. —Martin Gardner","brand":"Taylor Trade Publishing","offers":[{"title":"Default Title","offer_id":47129358172400,"sku":"9781589796737","price":16.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0737\/7593\/9824\/files\/9781589796737_p0.jpg?v=1769901061","url":"https:\/\/shop-qa.barnesandnoble.com\/products\/9781589796737","provider":"Barnes \u0026 Noble (DEV)","version":"1.0","type":"link"}