Soft copies of my puzzle books are now available at $4 per book.
Order:
www.easyapps.sg/ishop
TKL Sudoku - Learning Vol 1 to 4
TKL Sudoku - Challenging Vol 1 to 4
TKL Sudoku - Super Vol 1 to 4
TKL Intelligence Quiz - Vol 1 to 4
Discount available for purchasing the entire set of 4 volumes.