Never Surrender. The Samurai Sudoku and Puzzle Books for Adults (with 240 Conquests.) 12+

📙 Sudoku puzzles may be driving you nuts sometimes but you should still persevere. There are simply too many benefits to the activity to disregard it completely. Sudoku improves your memory, logic and creativity. It stimulates your brain and helps reduce our chances of developing Alzheimer's Disease and dementia. Grab a copy today.