{"product_id":"the-times-killer-su-doku-book-21-200-lethal-su-doku-puzzles-9780008673208","title":"The Times Killer Su Doku Book 21: 200 Lethal Su Doku Puzzles","description":"Challenge yourself with number puzzles \u003cp\u003e The latest volume in the hugely popular Killer Su Doku series from The Times, featuring the highest-quality puzzles with an extra element of arithmetic. \u003c\/p\u003e\u003cp\u003e These puzzles will test your skills to the limit, adding the challenge of arithmetic and taking Su Doku to a new and even deadlier level of difficulty. \u003c\/p\u003e\u003cp\u003e The puzzles use the same 9x9 grid as Su Doku but with an added mathematical challenge. The aim is not only to complete every row, column and cube so that it contains the numbers 1-9, it is also necessary to ensure that the outlined cubes add up to the same number as well. \u003c\/p\u003e\u003cp\u003e With 200 new Moderate, Tricky, Tough and Deadly Killer Su Doku puzzles, there is no chance to ease yourself in with simple puzzles. For those who like to live dangerously and push \u003cbr\u003e beyond their mental comfort zone, steel yourself for The Times' next, terribly tough instalment. \u003c\/p\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cb\u003eAbout the Author\u003c\/b\u003e\u003cbr\u003eTimes Mind Games publish a range of mind-boggling, high-quality puzzles including Times General Knowledge Crosswords, Cryptic Crosswords, Jumbo Crosswords, Quick Cryptic Crosswords, Codewords and Su Doku.\u003cbr\u003e","brand":"Times Books UK","offers":[{"title":"Default Title","offer_id":51720887566610,"sku":"9780008673208","price":10.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0831\/4771\/8930\/files\/img_826b2ed1-3457-4453-89a1-828c73487dd5.jpg?v=1762940475","url":"https:\/\/surprise-castle.myshopify.com\/products\/the-times-killer-su-doku-book-21-200-lethal-su-doku-puzzles-9780008673208","provider":"Surprise Castle","version":"1.0","type":"link"}