13 books • 1 series
Nishio's Big Book Of Puzzles: Red
Nishio's Big Book Of Puzzles: Blue
Number Place: Blue (Number Place)
Number Place: Yellow (Number Place)
Number Place: Red (Number Place)
O'ekaki Decadence
Sudoku Plus Volume 5
Sudoku Plus Volume 4
Sudoku Plus Volume 3
Sudoku Plus Volume 2
Sudoku Plus Volume 1
O'Ekaki Heaven
Sudoku Hell