Gould, Wayne, <br/><br/>
Su Doku for a Sharper Mind : 

 -  HarperCollins Publishers,  2008. 
<br/><br/><label>ISBN: </label>9780007269624 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sudoku.
<br/><br/><label>Dewey Class. No.: </label>793.74  / GOU