158 books • 21 series
The 2018 Killer Sudoku 9x9 Puzzle-A-Day Calendar Book (Puzzle-A-Day, #8)
250 Easy Classic Sudoku Puzzles 9x9 (Classic Sudoku, #2)
250 Very Hard Classic Sudoku Puzzles 9x9 (Classic Sudoku, #5)
The 2018 Kakuro 9x9 Puzzle-A-Day Calendar Book (Puzzle-A-Day, #9)
The 2018 Kropki Sudoku 9x9 Puzzle-A-Day Calendar Book (Puzzle-A-Day, #13)
250 Sehr Leicht Numbricks Ratsel 9x9 (Numbricks, #1)
1000 Very Hard Sudoku Puzzles 9x9 (1000 Puzzles, #6)
The 2018 Jigsaw Sudoku 9x9 Puzzle-A-Day Calendar Book (Puzzle-A-Day, #7)
The 2018 Sudoku X 9x9 Puzzle-A-Day Calendar Book (Puzzle-A-Day, #6)
The 2018 Straights 9x9 Puzzle-A-Day Calendar Book (Puzzle-A-Day, #11)
1000 Very Hard Hidoku Puzzles 9x9 (1000 Puzzles, #4)
1000 Hard Sudoku Puzzles 9x9 (1000 Puzzles, #5)
1000 Hard Numbricks Puzzles 9x9 (1000 Puzzles, #1)
The 2018 Sudoku 9x9 Puzzle-A-Day Calendar Book (Puzzle-A-Day, #5)
1000 Hard Hidoku Puzzles 9x9 (1000 Puzzles, #3)
1000 Very Hard Numbricks Puzzles 9x9 (1000 Puzzles, #2)
The 2018 Hidoku 9x9 Puzzle-A-Day Calendar Book (Puzzle-A-Day, #3)
The 2018 Hidoku 8x8 Puzzle-A-Day Calendar Book (Puzzle-A-Day, #4)
The 2018 Numbricks 8x8 Puzzle-A-Day Calendar Book (Puzzle-A-Day, #2)
The 2018 Numbricks 9x9 Puzzle-A-Day Calendar Book (Puzzle-A-Day, #1)
250 Extreme Hidoku Puzzles 7x7 (Hidoku, #19)
250 Easy to Medium Hidoku Puzzles 8x8 (Hidoku, #13)
250 Medium Hidoku Puzzles 7x7 (Hidoku, #17)
250 Medium to Hard Hidoku Puzzles 9x9 (Hidoku, #7)
