32 books • 3 series
Book #2: Numbricks Puzzles - 200 Hard to Expert 6x6 vol. 2
Book #3: Numbricks Puzzles - 200 Easy to Medium 8x8 vol. 3
Book #1: Sudoku X Puzzles - Easy to Expert 200 vol. 1
Book #2: Sudoku X Puzzles - Easy to Medium 200 vol. 2
Book #3: Sudoku X Puzzles - Hard to Expert 200 vol. 3
Book #1: Tapa Puzzles 9x9 - Easy 200 vol. 1
Book #3: Tapa Puzzles 9x9 - Hard 200 vol. 3
Book #4: Tapa Puzzles 9x9 - Expert 200 vol. 4