Will Shortz Presents Summertime Sudoku: 100 Wordless Crossword Puzzles
by
ISBN 13: 9780312588441
Format: Paperback (128 pages) Publisher: St. Martin's Griffin Published: 07 Jun 2011
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Train Your Brain: A Year's Worth of Puzzles
by George Gratzer
ISBN 13: 9781568817101
Format: Paperback (253 pages) Publisher: A K Peters/CRC Press Published: 11 Apr 2011
Will Shortz Presents Extreme Sudoku: 100 Challenging Puzzles
ISBN 13: 9780312681463
Format: Paperback (128 pages) Publisher: St. Martin's Griffin Published: 15 Feb 2011