174 books • 17 series
Creator of puzzles - Calcudoku 240 Hard Puzzles 9x9 (Volume 11) (Creator of Puzzles - Calcudoku, #11)
Creator of puzzles - Calcudoku 240 Hard Puzzles 8x8 (Volume 7) (Creator of Puzzles - Calcudoku, #7)
Creator of puzzles - Calcudoku 240 Normal Puzzles 9x9 (Volume 10) (Creator of Puzzles - Calcudoku, #10)
Creator of puzzles - Calcudoku 240 Expert Puzzles 9x9 (Volume 12) (Creator of Puzzles - Calcudoku, #12)