556 books • 56 series
Puzzles for Brain - Killer Sudoku 400 Easy to Medium Puzzles 10x10 vol.25 (Killer Sudoku, #25)
Puzzles for Brain - Killer Sudoku 200 Medium to Hard Puzzles 10x10 vol.22 (Killer Sudoku, #22)
Puzzles for Brain - Killer Sudoku 200 Easy to Expert Puzzles 10x10 vol.24 (Killer Sudoku, #24)
Puzzles for Brain - Killer Sudoku 200 Hard to Expert Puzzles 10x10 vol.23 (Killer Sudoku, #23)
Puzzles for Brain - Numbricks 200 Easy to Expert Puzzles 12x12 vol. 24 (Numbricks, #24)
Puzzles for Brain - Numbricks 200 Easy to Medium Puzzles 11x11 vol. 17 (Numbricks, #17)
Puzzles for Brain - Numbricks 200 Easy to Expert Puzzles 11x11 vol. 20 (Numbricks, #20)
Puzzles for Brain - Killer Sudoku 400 Easy to Expert Puzzles 10x10 vol.28 (Killer Sudoku, #28)
Puzzles for Brain - Numbricks 200 Easy to Medium Puzzles 12x12 vol. 21 (Numbricks, #21)