Aloha! 555 Awesome Killer Sudoku Puzzles Volume 7: A Big Treasury of Logic Games, with Instructions and Solutions, from Beginner to Pro, to Practice your Mind, to Train your Brain
Aloha! 555 Awesome Killer Sudoku Puzzles Volume 2: A Big Treasury of Logic Games, with Instructions and Solutions, from Beginner to Pro, to Practice your Mind, to Train your Brain
Aloha! 555 Awesome Killer Sudoku Puzzles Volume 10: A Big Treasury of Logic Games, with Instructions and Solutions, from Beginner to Pro, to Practice your Mind, to Train your Brain
Bravo! 505 Amusing Killer Sudoku Puzzles Volume 7: A Mind-boggling Treasury of Logic Games, with Guide and Solutions, from Beginner to Expert, to Boost your Mind, to Improve your Brain