Sudoku 500 Easy Puzzles: Geisha Series Book
Sudoku 600 Puzzles - 300 Medium & 300 Hard: Geisha Series Book
Sudoku 600 Puzzles - 300 Easy & 300 Medium: Geisha Series Book
Sudoku 1000 Very Hard Puzzles: Geisha Series Book
Sudoku 1000 Easy Puzzles: Geisha Series Book
Sudoku: 1800 Easy Puzzles To Keep Your Brain Active For Hours: Active Brain Series Book
Sudoku: 1800 Hard Puzzles To Keep Your Brain Active For Hours: Active Brain Series Book
Sudoku 1200 Hard Puzzles: Keep Your Brain Active For Hours (Active Brain Series)