1.
How to Solve Sudokus in 5 Minutes - Techniques, Strategies, Training Methods and Timing Char...
by Colloby, Mike
ISBN: 9781430323518
List Price: $34.95
2.
Visualization Techniques For Solving Sudokus In 5 Minutes
by Colloby, Mike
ISBN: 9781435701540
List Price: $35.95
3.
How to become a Top Sudoku Player - Techniques, Puzzles, Training Methods and Timing Charts ...
by Colloby, Mike
ISBN: 9780557037698
List Price: $45.95