556 books • 56 series
Puzzles for Brain - Outside Sudoku 400 Easy to Medium Puzzles vol.9 (Outside Sudoku, #9)
Puzzles for Brain - Consecutive Sudoku 200 Hard to Expert Puzzles 9x9 vol.8 (Consecutive Sudoku, #8)
Puzzles for Brain - Consecutive Sudoku 200 Easy to Medium Puzzles 9x9 vol.7 (Consecutive Sudoku, #7)
Puzzles for Brain - Mini Consecutive Sudoku 400 Easy to Expert Puzzles 6x6 vol.9 (Mini Consecutive Sudoku, #9)
Puzzles for Brain - Consecutive Sudoku 400 Easy to Expert Puzzles 9x9 vol.10 (Consecutive Sudoku, #10)