Series:

Hard Puzzles Book

9 primary works

Book 1

Cover of Hard Puzzles Book - 400 Hard Puzzles; Calcudoku, Futoshiki, Hidoku, Binary - vol.1

Book 2

Cover of Hard Puzzles Book - 200 Hard Puzzles; Hitori, Slitherlink, Numbricks, Suguru

Book 3

Cover of Hard Puzzles Book - Hitori, CalcuDoku, Binary, Suguru - 200 Hard Puzzles

Book 4

Cover of Hard Puzzles Book - Skyscrapers, Slitherlink, Straights, Hidoku - 200 Hard Puzzles

Book 5

Cover of Hard Puzzles Book - Akari, Futoshiki, Kakuro, Suguru - 200 Hard Puzzles

Book 7

Cover of Hard Puzzles Book - Sudoku X, Anti Diagonal Sudoku, Killer Sudoku, Consecutive Sudoku - 200 Hard Puzzles vol.7

Book 8

Cover of Hard Puzzles Book - Jigsaw Sudoku, Non-Consecutive Sudoku, Kropki Sudoku, Chain Sudoku - 200 Hard Puzzles vol.8

Book 9

Cover of Hard Puzzles Book - Slitherlink, Hashi, Futoshiki, Numbricks - 200 Hard Puzzles vol.9

Book 10

Cover of Hard Puzzles Book - Suguru, Binary, Tapa, Straights - 200 Hard Puzzles vol.10