{"product_id":"skill-builder-sudoku-hard-to-expert-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\u003eBinding Type:\u003c\/b\u003e Paperback\u003cbr\u003e\u003cb\u003ePublisher:\u003c\/b\u003e Puzzlewright Press\u003cbr\u003e\u003cb\u003ePublished:\u003c\/b\u003e 02\/03\/2026\u003cbr\u003e\u003cb\u003eISBN:\u003c\/b\u003e 9781454958888\u003cbr\u003e\u003cb\u003ePages:\u003c\/b\u003e 160","brand":"Peter Gordon,Frank Longo","offers":[{"title":"Default Title","offer_id":52085523546293,"sku":"9781454958888","price":11.04,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0473\/0804\/6492\/files\/img_a0fbe416-d170-4ccf-81a1-0c7d240f304c.jpg?v=1765294421","url":"https:\/\/pastforward.org\/products\/skill-builder-sudoku-hard-to-expert-9781454958888","provider":"Past Forward","version":"1.0","type":"link"}