It has come to my attention that the rules section of the Sudoku 10 book was a bit too fuzzy. I therefore decided to put the book on hold for some days, meaning that it is not currently available on Amazon.com. It will be available again soon. Within some days or a week.

The illustrations have now been updated and will be more Sudoku 10 specific instead of showing how to solve the game looking at the individual games and using general sudoku rules and tips. I think this should avoid any confusion in reading the instructions, and make them easier to understand also for players new to sudoku in general.

In the next volume in the Sudoku 10 series (volume 2, due end of february) also the game board will be modified a bit to make the individual 3 by 3 sections stand out a bit more, using a slightly thickened line. The board has also been made larger (approx. 20 mm) in height, given the constraints of the book's size.

Sudoku 10, Volume 1, will be available again in a couple of days, thanks to print-on-demand! :-)