{"title":"Calcudoku Puzzle Books","description":"\u003cp\u003eSharpen your mind with our collection of Calcudoku puzzle books! These logic-based number puzzles offer hours of engaging mental exercise. Perfect for puzzle enthusiasts of all skill levels, dive in and test your problem-solving prowess.\u003c\/p\u003e","products":[{"product_id":"calcudoku-puzzle-books-400-easy-to-master-puzzles-6x6-volume-2-book-dart-veider-9781691396382","title":"Calcudoku Puzzle Books - 400 Easy to Master Puzzles 6x6 (Volume 2)","description":"\u003cb\u003eCalcudoku\u003c\/b\u003e (also known as\u0026gt;\u003ci\u003eMathdoku\u003c\/i\u003e) is a mathematical and logical puzzle loosely similar to Sudoku.\u003cbr\u003eThe objective is to fill the grid in with the digits 1 through N (where N is the number of rows or columns in the grid) such that: \u003cbr\u003e - Each row contains exactly one of each digit.\u003cbr\u003e- Each column contains exactly one of each digit.\u003cbr\u003e- Each bold-outlined group of cells (block) contains digits which achieve the specified result using the specified mathematical operation: addition (+), subtraction (-), multiplication ( ), and division ( ).\u003cbr\u003e- Unlike Killer Sudoku, digits may repeat within a block.","brand":"WoB","offers":[{"title":"US \/ WELL_READ \/ SBYB","offer_id":50399735480593,"sku":"CIN1691396389A","price":0.0,"currency_code":"GBP","in_stock":false},{"title":"US \/ NEW \/ INGRAM","offer_id":51234147926289,"sku":"NIN9781691396382","price":0.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/1691396389.jpg?v=1751152636"},{"product_id":"logic-puzzles-for-adults-book-robert-lorens-9781980674474","title":"Logic Puzzles For Adults","description":null,"brand":"WoB","offers":[{"title":"- \/ - \/ -","offer_id":51076899209489,"sku":"","price":0.0,"currency_code":"GBP","in_stock":true},{"title":"US \/ NEW \/ INGRAM","offer_id":51076902715665,"sku":"NIN9781980674474","price":0.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/1980674477.jpg?v=1751220203"},{"product_id":"logic-puzzles-and-games-book-robert-lorens-9781980683810","title":"Logic Puzzles and Games","description":null,"brand":"WoB","offers":[{"title":"- \/ - \/ -","offer_id":51076905369873,"sku":"","price":0.0,"currency_code":"GBP","in_stock":true},{"title":"US \/ NEW \/ INGRAM","offer_id":51076908581137,"sku":"NIN9781980683810","price":0.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/1980683816.jpg?v=1750868676"},{"product_id":"calcudoku-puzzle-books-400-easy-to-master-puzzles-9x9-volume-5-book-dart-veider-9781697214925","title":"Calcudoku Puzzle Books - 400 Easy to Master Puzzles 9x9 (Volume 5)","description":null,"brand":"WoB","offers":[{"title":"- \/ - \/ -","offer_id":51226375749905,"sku":"","price":0.0,"currency_code":"GBP","in_stock":true},{"title":"US \/ NEW \/ INGRAM","offer_id":51226378797329,"sku":"NIN9781697214925","price":0.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/1697214924.jpg?v=1750721884"},{"product_id":"calcudoku-puzzle-books-400-easy-to-master-puzzles-8x8-volume-4-book-dart-veider-9781695005303","title":"Calcudoku Puzzle Books - 400 Easy to Master Puzzles 8x8 (Volume 4)","description":null,"brand":"WoB","offers":[{"title":"- \/ - \/ -","offer_id":51231283806481,"sku":"","price":0.0,"currency_code":"GBP","in_stock":true},{"title":"US \/ NEW \/ INGRAM","offer_id":51231285018897,"sku":"NIN9781695005303","price":0.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/1695005309.jpg?v=1751183548"},{"product_id":"calcudoku-puzzle-books-400-easy-to-master-puzzles-7x7-volume-3-book-dart-veider-9781692762155","title":"Calcudoku Puzzle Books - 400 Easy to Master Puzzles 7x7 (Volume 3)","description":null,"brand":"WoB","offers":[{"title":"- \/ - \/ -","offer_id":51232484229393,"sku":"","price":0.0,"currency_code":"GBP","in_stock":true},{"title":"US \/ NEW \/ INGRAM","offer_id":51232485835025,"sku":"NIN9781692762155","price":0.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/169276215X.jpg?v=1751409390"},{"product_id":"calcudoku-puzzle-books-400-easy-to-master-puzzles-5x5-volume-1-book-dart-veider-9781689727150","title":"Calcudoku Puzzle Books - 400 Easy to Master Puzzles 5x5 (Volume 1)","description":null,"brand":"WoB","offers":[{"title":"- \/ - \/ -","offer_id":51244143411473,"sku":"","price":0.0,"currency_code":"GBP","in_stock":true},{"title":"US \/ NEW \/ INGRAM","offer_id":51244145574161,"sku":"NIN9781689727150","price":0.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/1689727152.jpg?v=1750864663"},{"product_id":"complex-math-puzzles-book-jeff-heldt-9781719873512","title":"Complex Math Puzzles","description":null,"brand":"WoB","offers":[{"title":"- \/ - \/ INTERNAL","offer_id":52953708724497,"sku":null,"price":0.0,"currency_code":"GBP","in_stock":true},{"title":"US \/ NEW \/ INGRAM","offer_id":52953708790033,"sku":"NIN9781719873512","price":0.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/9781719873512.jpg?v=1766087699"}],"url":"https:\/\/www.worldofbooks.com\/collections\/calcudoku-puzzle-books-book-series.oembed","provider":"World of Books ","version":"1.0","type":"link"}