Number Sums: Math Logic Challenges: Puzzles Using Row and Column Sums (Number Puzzles)

Number Sums: Relaxing Logic Challenges: Puzzles Using Row and Column Sums

Kakuro Cross Sums Volume IV (Number Logic Puzzles, Band 4)

Kakuro Cross Sums Volume III (Number Logic Puzzles, Band 3)

Kakuro Puzzle Book : 300 Medium 9x9 Number Logic Puzzles for Teens,...