Series:

Hard

37 primary works

Book 1

Cover of Killer Sudoku - 200 Hard Puzzles 9x9 (Volume 1)

Book 1

Cover of Straights Puzzles Book - 200 Hard Puzzles 9x9 (Volume 1)

Book 1

Cover of Suguru - 200 Hard Puzzles 9x9 (Volume 1)

Book 2

Cover of Killer Sudoku - 200 Hard Puzzles 9x9 (Volume 2)

Book 2

Cover of Straights Puzzles Book - 200 Hard Puzzles 9x9 (Volume 2)

Book 3

Cover of Killer Sudoku - 200 Hard Puzzles 9x9 (Volume 3)

Book 3

Cover of Straights Puzzles Book - 200 Hard Puzzles 9x9 (Volume 3)

Book 3

Cover of Suguru - 200 Hard Puzzles 9x9 (Volume 3)

Book 4

Cover of Killer Sudoku - 200 Hard Puzzles 9x9 (Volume 4)

Book 4

Cover of Straights Puzzles Book - 200 Hard Puzzles 9x9 (Volume 4)

Book 4

Cover of Suguru - 200 Hard Puzzles 9x9 (Volume 4)

Book 5

Cover of Straights Puzzles Book - 200 Hard Puzzles 9x9 (Volume 5)

Book 5

Cover of Killer Sudoku - 200 Hard Puzzles 9x9 (Volume 5)

Book 6

Cover of Suguru - 200 Hard Puzzles 9x9 (Volume 6)

Book 6

Cover of Calcudoku Puzzles Book - 200 Hard Puzzles 9x9 (Volume 6)

Book 6

Cover of Numbricks Puzzles Book - 200 Hard Puzzles 9x9 (Volume 6)

Book 6

Cover of Killer Sudoku - 200 Hard Puzzles 9x9 (Volume 6)

Book 6

Cover of Straights Puzzles Book - 200 Hard Puzzles 9x9 (Volume 6)

Book 7

Cover of Suguru - 200 Hard Puzzles 9x9 (Volume 7)

Book 7

Cover of Numbricks Puzzles Book - 200 Hard Puzzles 9x9 (Volume 7)