Title: New York Post Gold Su Doku, Author: Wayne Gould
Title: New York Post Silver Su Doku, Author: Wayne Gould
Title: Original O'Ekaki: Intelligent Designs from Its Creator, Author: Tetsuya Nishio
Title: Penguin Pocket Sudoku: Banish Boredom with the Book No Pocket Should Be Without, Author: David J. Bodycombe
Title: New York Post Train Your Brain Su Doku: Medium, Author: Wayne Gould
Title: New York Post Train Your Brain Su Doku: Difficult, Author: Wayne Gould
Title: The Times Difficult Su Doku Book 2: 200 challenging puzzles from The Times (The Times Su Doku), Author: The Times Mind Games
Title: The Times Killer Su Doku 5: 150 challenging puzzles from The Times (The Times Su Doku), Author: The Times Mind Games
Title: New York Post Guru Su Doku: Fiendish, Author: HarperCollins
Title: New York Post Apprentice Su Doku: Medium, Author: HarperCollins
Title: New York Post Master Su Doku: Difficult, Author: HarperCollins
Title: Calcu-doku & Sudoku, Author: Conceptis Puzzles
Title: The Times Ultimate Killer Su Doku: 120 challenging puzzles from The Times (The Times Su Doku), Author: The Times Mind Games
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Title: SUDOKU Puzzles - Christmas Edition, Hard to Very Hard: Puzzles + Solutions, Author: Monica Jones
Title: Sudoku Plus Volume Four, Author: Tetsuya Nishio
Title: Sudoku Plus, Volume Five: Handmade Puzzles from the World's Puzzle Master, Author: Tetsuya Nishio
Title: The Times Killer Su Doku 6: 150 challenging puzzles from The Times (The Times Su Doku), Author: The Times Mind Games
Title: New York Post Mind-blowing Su Doku: 150 Fiendish Puzzles, Author: HarperCollins Publishers Ltd.
Title: New York Post Electrifying Su Doku: 150 Difficult Puzzles, Author: HarperCollins Publishers Ltd.

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