348 books • 21 series
Calcudoku Puzzles Book - 200 Easy to Master Puzzles 9x9 (Volume 1) (Calcudoku - Easy to Master, #1)
Calcudoku Puzzles Book - 200 Easy to Master Puzzles 9x9 (Volume 4) (Calcudoku - Easy to Master, #4)
Calcudoku Puzzles Book - 200 Easy to Master Puzzles 9x9 (Volume 3) (Calcudoku - Easy to Master, #3)
Calcudoku Puzzles Book - 200 Easy to Master Puzzles 9x9 (Volume 2) (Calcudoku - Easy to Master, #2)
Calcudoku Puzzles Book - 200 Easy to Normal Puzzles 9x9 (Volume 1) (Calcudoku - Easy to Normal, #1)
Numbricks Puzzles Book - 200 Hard to Master Puzzles 9x9 (Volume 2) (Numbricks - Hard to Master, #2)
Numbricks Puzzles Book - 200 Easy to Normal Puzzles 9x9 (Volume 5) (Numbricks - Easy to Normal, #5)
Numbricks Puzzles Book - 200 Easy to Normal Puzzles 9x9 (Volume 4) (Numbricks - Easy to Normal, #4)