Linda Copson

• 400 Easy Sudoku-X Puzzles Volume 1
• 400 Easy Sudoku-X Puzzles Volume 2
• 400 Easy Sudoku-X Puzzles Volume 3
• 400 Hard Sudoku-X Puzzles Volume 1
• 400 Hard Sudoku-X Puzzles Volume 2
• 400 Hard Sudoku-X Puzzles Volume 3
• 400 Medium Sudoku-X Puzzles Volume 1
• 400 Medium Sudoku-X Puzzles Volume 3
• 400 Very Easy Sudoku-X Puzzles Volume 1
• 400 Very Easy Sudoku-X Puzzles Volume 2