Book Tridoku Sudoku. Hard Level.: 400+ Challenging Puzzles. Holmes Presents a Book for Productive Fitness to Your Brain. (Plus 250 Sudoku and 250 Puzzles That Can Be Printed).
(Tridoku Logic Puzzle, #4)
Bookhype may earn a small commission from qualifying purchases.
Full disclosure.
Book Tridoku Sudoku. Hard Level.: 400+ Challenging Puzzles. Holmes Presents a Book for Productive Fitness to Your Brain. (Plus 250 Sudoku and 250 Puzzles That Can Be Printed).
(Tridoku Logic Puzzle, #4)
