Original Sudoku - Nikoli Publishing, and Editors of Nikoli Publishing, CC

With 320 puzzles, from easy to very difficult, these handmade--not computer-generated--puzzles come with sample games, tips, and an insider's tutorial to help every newbie get up to speed and to strengthen the abilities of the most experienced player.

Original Sudoku 2005, Workman Publishing, New York, NY

ISBN-13: 9780761142157

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