Related Series: The Times Su Doku, The Times Difficult Su Doku, Grand Master Sudoku
The Extreme Su Doku book series by Wayne Gould includes books Extreme Su Doku, Extreme Su Doku: Bk. 2 (Sudoku), and Extreme Su Doku: Bk. 3. See the complete Extreme Su Doku series book list in order, box sets or omnibus editions, and companion titles.
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