Do you like Sudoku? Sudoku ABC presents 26 Sudoku puzzles, all in the form of letters. Originally, these Sudoku puzzles were created in Puzzlium. This 26-letter compilation was presented to celebrate a Centennial Jubilee of Martin Gardner at the Celebration of Mind event in Stanford, CA, US in October of 2014.

The object is to fill in the grid so that each row, column, and region contains different digits, 1 thru 6. To get help, use the Hint and Solution options. Remember to return to the puzzle every time you use these options, so that to not reveal hints or solutions to other puzzles. Use the Previous and Next options to navigate between puzzles.

Tap @Puzzlium to open a puzzle directly in Puzzlium and solve it interactively. The @Puzzlium option only works on iPhone, iPad, and iPod touch devices with the installed Puzzlium app.

The puzzle book is specially designed for solving on any Kindle e-reader or tablet, as well as on other devices with the Kindle app.

Happy Puzzling!