Amazon.com: Sudoku: Its Power Unleashed -- Kindle Version eBook : Klein, David: Kindle Store
Sudoku: Very Hard: X-Wing or Swordfish 200 puzzles: Djape: 9781548446857: Amazon.com: Books
Adult book. Big Numbricks and Killer sudoku. Medium - hard levels.: Very large font. Brain sudoku. (Sudoku and large size puzzles): Holmes, Basford: 9781082253621: Amazon.com: Books
100 Hard X-Wing Sudoku: Media, Clarity: 9781728814667: Amazon.com: Books
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Sudoku: Very Hard: X-Wing or Swordfish 200 puzzles: Djape: 9781548446857: Amazon.com: Books
Sudoku for Everyone: Easy to Understand Sudoku Solving - Kindle edition by McCollum, Philip. Humor & Entertainment Kindle eBooks @ Amazon.com.
Hard Sudoku Puzzle Book for Adults: 300 Large Print Puzzles: Andrews, Kat: 9781732752092: Amazon.com: Books
Sudoku: Very Hard: X-Wing or Swordfish 200 puzzles: Djape: 9781548446857: Amazon.com: Books
Extreme Sudoku Puzzle Book for Adults: Hard to Extremely Hard | 156 Difficult Puzzles: Publishing, Puzzle King: 9798692087775: Amazon.com: Books
Puzzlewright Guide to Solving Sudoku: Hundreds of Puzzles Plus Techniques to Help You Crack Them All: Longo, Frank, Gordon, Peter: 9781402799457: Amazon.com: Books
Sudoku Hard: Sudoku Puzzle Book With 320 Hard Sudoku Puzzles For Adults: Rosenbladt: 9798665413617: Amazon.com: Books
Sudoku Hard 500 Puzzles: Sudoku Puzzle Book - 500 Puzzles and Solutions - Hard Level - Volume 3. Tons of Fun for your Brain!: Puzzles, BeeBoo: 9781691812110: Amazon.com: Books
The Sudoku Method - Volume 1 - Beginner to Advanced (Learn how to solve Sudoku puzzles): Houdini, Sherlock: 9781511452663: Amazon.com: Books