{"product_id":"skill-builder-sudoku-peter-gordon-9781454958888","title":"Skill Builder Sudoku: Hard to Expert","description":"\u003cb\u003eBuild up your sudoku skills from easy to expert!\u003c\/b\u003e \u003cp\u003e\u003c\/p\u003e In this three-book series, each book helps solvers build their skills to get from one level to the next. Puzzles in \u003ci\u003eHard to Expert\u003c\/i\u003e are the most challenging and will build on the skills learned in the second book, \u003ci\u003eMedium to Hard\u003c\/i\u003e. Each new technique (such as swordfish and grid coloring) is introduced gradually, giving solvers time to fully master each skill as they progress to complete sudoku mastery.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eAuthor:\u003c\/b\u003e Peter Gordon, Frank Longo\u003cbr\u003e\u003cb\u003eISBN-10:\u003c\/b\u003e 145495888X\u003cbr\u003e\u003cb\u003eISBN-13:\u003c\/b\u003e 9781454958888\u003cbr\u003e\u003cb\u003ePublisher:\u003c\/b\u003e Puzzlewright Press\u003cbr\u003e\u003cb\u003eLanguage:\u003c\/b\u003e English\u003cbr\u003e\u003cb\u003ePublished:\u003c\/b\u003e 02\/03\/2026\u003cbr\u003e\u003cb\u003ePages:\u003c\/b\u003e 160\u003cbr\u003e\u003cb\u003eFormat:\u003c\/b\u003e Paperback","brand":"Peter Gordon","offers":[{"title":"Paperback","offer_id":46747800666367,"sku":"9781454958888","price":12.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/2982\/9887\/files\/img_55e0b54e-8c15-47cd-a3fc-eb120042ee32.jpg?v=1743584772","url":"https:\/\/www.whiterainbookhouse.com\/products\/skill-builder-sudoku-peter-gordon-9781454958888","provider":"WR Book House","version":"1.0","type":"link"}