{"product_id":"the-ultimate-sudoku-challenge-9781402736490","title":"The Ultimate Sudoku Challenge","description":"\u003cp\u003eConfident solvers who think theyve got Sudoku down cold will have to think again  because these are absolutely the most fiendishly difficult  devilishly baffling Sudokus ever devisedand the biggest  too. Created by hand in Japanfrom Nikoli  the company responsible for the puzzles popularity in that countrythe collection includes megasudokus on a 25 x 25 grid  designed to give even the sharpest minds a workout. True to its title  its the ultimate challenge  and one that millions of Sudoku-obsessed fans will find irresistible. And for total newcomers brave enough to high-dive in at the deep end  theres a quick tutorial to get them started.\u003c\/p\u003e","brand":"My Store","offers":[{"title":"Default Title","offer_id":45788719317045,"sku":"ByrdShop_1402736495","price":239.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/8139\/0901\/files\/9781402736490.jpg?v=1784651927","url":"https:\/\/atxbooks.com\/products\/the-ultimate-sudoku-challenge-9781402736490","provider":"ATX Books","version":"1.0","type":"link"}