Authors: Puzzle Pulse

Keep Calm And Solve On Sudoku Puzzle Book — Puzzle Pulse
Meet Your Match! Puzzles Sudoku X Edition — Puzzle Pulse
It’s All In The Game Sudoku Variety Book — Puzzle Pulse
Food For The Brain! Intermediate Puzzles Sudoku Medium Edition — Puzzle Pulse
Challenging Sudoku Sudoku Puzzle Book Hard Edition — Puzzle Pulse
Hot Molten Lava! Extreme and Hard Puzzles Sudoku Mind Melting Edition — Puzzle Pulse