Oy Vey! Sudoku
by Frank Longo
ISBN 13: 9781402740107
Format: Paperback (96 pages) Publisher: Sterling Publishing (NY) Published: 30 Aug 2006
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Skill Builder Sudoku: Easy to Medium
by Peter GordonFrank Longo,
ISBN 13: 9781454958864
Format: paperback Publisher: Puzzlewright Press
Second-Degree Black Belt Sudoku® (Martial Arts Puzzles Series)
ISBN 13: 9781402737176
Format: Paperback (192 pages) Publisher: Puzzlewright Published: 25 May 2006