Over 1000 full-age Sudoku puzzles: From easy to difficult, and special puzzles

• From easy to difficult, and special puzzles
• It's a step-by-step puzzle that adults and smart children can solve together.
• The solution is in the middle of the puzzle.\

Put your phone down for a while and enjoy this puzzle with a pencil
You will find yourself focusing on this puzzle book!
Present good habits to children and friends or those who need concentration
You'll be satisfied if you buy this puzzle.