Saller Logical
1000 Hidoku Vol. 2: Japanese puzzles: brain teaser and brain training - level: medium
1000 Sudoku XV Vol. 2: Japanese puzzles: brain teaser and brain training - level: hard
1000 Hidoku Vol. 1: Japanese puzzles: brain teaser and brain training - level: hard
1000 Fill-a-Pix Vol. 1: Japanese puzzles: brain teaser and brain training - level: very hard
1000 Numbrix Vol. 2: Japanese puzzles: brain teaser and brain training - level: hard
1000 Consecutive-Sudoku Vol. 1: Japanese puzzles: brain teaser and brain training - level: very easy
500 Outside Sudoku Vol. 1: Japanese puzzles: brain teaser and brain training - level: medium
1000 Slitherlink Vol. 1: Japanese puzzles: brain teaser and brain training - level: hard
1000 Mine-Sudoku Vol. 2: Japanese puzzles: brain teaser and brain training - level: hard
1000 Fill-a-Pix Vol. 1: Japanese puzzles: brain teaser and brain training - level: easy
1000 Fill-a-Pix Vol. 2: Japanese puzzles: brain teaser and brain training - level: hard
1000 Fill-a-Pix Vol. 1: Japanese puzzles: brain teaser and brain training - level: medium
1000 Hidoku Vol. 2: Japanese puzzles: brain teaser and brain training - level: medium