70 books • 7 series
Calcudoku - 200 Easy Puzzles 9x9 (Volume 9) (Easy..., #9)
Calcudoku - 200 Normal Puzzles 9x9 (Volume 8) (Normal, #8)
Calcudoku - 200 Hard Puzzles 9x9 (Volume 6) (Hard, #6)
Calcudoku - 200 Hard Puzzles 9x9 (Volume 7) (Hard, #7)
Calcudoku - 200 Hard Puzzles 9x9 (Volume 8) (Hard, #8)
Calcudoku - 200 Normal Puzzles 9x9 (Volume 10) (Normal, #10)
Calcudoku - 200 Easy Puzzles 9x9 (Volume 7) (Easy..., #7)
Calcudoku - 200 Normal Puzzles 9x9 (Volume 6) (Normal, #6)
Calcudoku - 200 Easy to Master Puzzles 9x9 (Volume 8) (Easy to Master, #8)
Calcudoku - 200 Easy to Master Puzzles 9x9 (Volume 6) (Easy to Master, #6)
Calcudoku - 200 Easy to Master Puzzles 9x9 (Volume 7) (Easy to Master, #7)
Calcudoku - 200 Easy to Normal Puzzles 9x9 (Volume 1) (Easy to Normal, #1)
Calcudoku - 200 Hard to Master Puzzles 9x9 (Volume 2) (Hard to Master, #2)
Calcudoku - 200 Easy to Normal Puzzles 9x9 (Volume 3) (Easy to Normal, #3)
Calcudoku - 200 Hard to Master Puzzles 9x9 (Volume 3) (Hard to Master, #3)
Calcudoku - 200 Hard to Master Puzzles 9x9 (Volume 5) (Hard to Master, #5)
Calcudoku - 200 Hard to Master Puzzles 9x9 (Volume 4) (Hard to Master, #4)
Calcudoku - 200 Easy to Normal Puzzles 9x9 (Volume 2) (Easy to Normal, #2)
Calcudoku - 200 Easy to Normal Puzzles 9x9 (Volume 4) (Easy to Normal, #4)
Calcudoku - 200 Hard to Master Puzzles 9x9 (Volume 1) (Hard to Master, #1)
Calcudoku - 200 Easy to Normal Puzzles 9x9 (Volume 5) (Easy to Normal, #5)
Calcudoku - 200 Hard Puzzles 9x9 (Volume 2) (Hard, #2)
Calcudoku - 200 Hard Puzzles 9x9 (Volume 1) (Hard, #1)
Calcudoku - 200 Hard Puzzles 9x9 (Volume 3) (Hard, #3)