Level 9 Black Belt Sudoku (Martial Arts Sudoku)
by Frank Longo
ISBN 13: 9781402737619
Format: Paperback (96 pages) Publisher: Sterling Published: 18 May 2006
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Petite Christmas Sudoku
ISBN 13: 9781402788185
Format: Hardcover (128 pages) Publisher: Puzzlewright Published: 04 Oct 2011
Ninja Assassin Sudoku: Brown Belt
ISBN 13: 9781402796371
Format: Paperback (176 pages) Publisher: Sterling Published: 09 Feb 2012
10 X 10 Sudoku
ISBN 13: 9781402740190
Format: Paperback (272 pages) Publisher: Sterling Publishing (NY) Published: 30 Aug 2006
Skill Builder Sudoku: Easy to Medium
by Peter GordonFrank Longo,
ISBN 13: 9781454958864
Format: paperback Publisher: Puzzlewright Press