Sudoku Puzzle Book for Adults: 3000 Medium to Hard Sudoku Puzzles with Solutions - Vol. 1

Sudoku Puzzle Book for Adults: 3000 Medium to Hard Sudoku Puzzles with Solutions - Vol. 1

Big Book of Sudoku - Medium to Hard - 1000 Puzzles: Huge Bargain Collection of 1000 Puzzles and Solutions, Medium to Hard Level, Tons of Challenge for your Brain!

1000+ Sudoku Puzzles for Adults: Medium to Hard Sudoku Puzzles with Detailed Step-by-step Solutions and Hints When You Get Stuck (SENIORTASSE PUZZLE MASTERY)