94 books • 44 series
Book #1: Ten-Box Sudoku
Book #1: Battleships Puzzles
Book #30: Lighthouse Battleships
Book #55: Digital Battleships
Book #1: Bent Diagonal Sudoku
Book #33: Chain Sudoku
Book #1: Clueless Explosion
Book #1: Clueless SExplosion
Book #15: Sudoku X
Book #1: Douieru Puzzles
Book #1: Futoshiki
Book #42: Futoshiki X
Book #1: Nonograms for Experts
Book #17: 250 Hidoku Puzzle Book
Book #6: Hitori
Book #9: Jigsaw Sudoku
Book #1: Sudoku Kunoichi
Book #1: Linkapix for Beginners
Book #1: Little Killer Sudoku
Book #1: Magnets Puzzle
Book #1: Clueless Windoku X
Book #6: Mintonette
Book #2: Train Tracks Puzzles