556 books • 56 series
Book #1: Akari Puzzles 9x9 - Easy 200 vol. 1
Book #1: Binary Puzzles - Easy 200 vol. 1
Book #2: Binary Puzzles - Medium 200 vol. 2
Book #3: Binary Puzzles - Hard 200 vol. 3
Book #4: Binary Puzzles - Expert 200 vol. 4
Book #1: Kakuro Puzzles 9x9 - 200 vol. 1
Book #2: Kakuro Puzzles 10x10 - 200 vol. 2