{"product_id":"9781454958888","title":"Skill Builder Sudoku: Hard to Expert","description":"\u003cb\u003eBuild up your sudoku skills from easy to expert!\u003c\/b\u003e\u003cbr\u003e\u003cbr\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.","brand":"Union Square \u0026 Co.","offers":[{"title":"Default Title","offer_id":43085067452477,"sku":"9781454958888","price":12.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0603\/0838\/9949\/files\/9781454958888_p0.jpg?v=1775252906","url":"https:\/\/www.tatteredcover.com\/products\/9781454958888","provider":"Tattered Cover","version":"1.0","type":"link"}