Series:

Hard

43 primary works

Book 9

Cover of Suguru - 200 Hard Puzzles 9x9 (Volume 9)

Book 9

Cover of Battleships - 200 Hard Logic Puzzles 9x9 (Volume 9)

Book 9

Cover of Killer Sudoku - 200 Hard Puzzles 9x9 (Volume 9)

Book 10

Cover of Killer Sudoku - 200 Hard Puzzles 9x9 (Volume 10)

Book 10

Cover of Suguru - 200 Hard Puzzles 9x9 (Volume 10)

Book 10

Cover of Sudoku X - 200 Hard Puzzles 9x9 (Volume 10)

Book 10

Cover of Sudoku Jigsaw - 200 Hard Puzzles 9x9 (Volume 10)

Book 10

Cover of Battleships - 200 Hard Logic Puzzles 9x9 (Volume 10)

Book 11

Cover of Killer Sudoku - 200 Hard Puzzles 9x9 (Volume 11)

Book 11

Cover of Hidoku - 200 Hard Puzzles 9x9 (Volume 11)

Book 11

Cover of Sudoku X - 200 Hard Puzzles 9x9 (Volume 11)

Book 12

Cover of Killer Sudoku - 200 Hard Puzzles 9x9 (Volume 12)

Book 12

Cover of Hidoku - 200 Hard Puzzles 9x9 (Volume 12)

Book 12

Cover of Sudoku X - 200 Hard Puzzles 9x9 (Volume 12)

Book 13

Cover of Killer Sudoku - 200 Hard Puzzles 9x9 (Volume 13)

Book 13

Cover of Hidoku - 200 Hard Puzzles 9x9 (Volume 13)

Book 13

Cover of Sudoku X - 200 Hard Puzzles 9x9 (Volume 13)

Book 14

Cover of Killer Sudoku - 200 Hard Puzzles 9x9 (Volume 14)

Book 14

Cover of Hidoku - 200 Hard Puzzles 9x9 (Volume 14)

Book 14

Cover of Sudoku X - 200 Hard Puzzles 9x9 (Volume 14)