129 books
Killer Sudoku - 250 Hard+ Puzzles 9x9 (Volume 13)
Killer Sudoku - 250 Hard Puzzles 9x9 (Volume 10)
Killer Sudoku - 250 Medium+ Puzzles 9x9 (Volume 7)
Killer Sudoku - 250 Hard+ Puzzles 9x9 (Volume 14)
Killer Sudoku - 250 Medium+ Puzzles 9x9 (Volume 6)
Bridges - 200 Hard Bridges Puzzles 20x25 (Volume 8)
Bridges - 200 Hard Bridges Puzzles 20x25 (Volume 7)
Bridges - 250 Medium+ Bridges Puzzles 22x14 (Volume 6)
Bridges - 250 Medium+ Bridges Puzzles 22x14 (Volume 5)
Bridges - 300 Medium Bridges Puzzles 9x9 (Volume 4)
Bridges - 300 Easy Bridges Puzzles 9x9 (Volume 1)
Bridges - 300 Medium Bridges Puzzles 9x9 (Volume 3)
Bridges - 300 Medium Bridges Puzzles 9x9 (Volume 2)
Suguru - 250 Hard Suguru Puzzles 12x10 (Volume 7)
Suguru - 250 Hard Suguru Puzzles 12x10 (Volume 5)
Suguru - 250 Hard Suguru Puzzles 12x10 (Volume 6)
Kenken - 250 Medium Puzzles 6x6 (Volume 11)
Kenken - 250 Hard Puzzles 6x6 (Volume 16)
Kenken - 250 Hard Puzzles 6x6 (Volume 15)
Kenken - 250 Hard Puzzles 6x6 (Volume 14)
Kenken - 250 Medium Puzzles 6x6 (Volume 12)
Kenken - 250 Medium Puzzles 6x6 (Volume 13)
Slitherlink - 300 Hard Puzzles 7x7 (Volume 3)
Slitherlink - 300 Easy Puzzles 7x7 (Volume 1)