27 books • 8 series
Book #1: 84 Sudoku Easy - Extreme - Volume 1
Book #1: SUDOKU Easy - Hard - 200 PUZZLES WITH SOLUTION
Book #1: SUDOKU Easy - Extreme - 500 PUZZLES WITH SOLUTION
Book #2: Easy - Medium SUDOKU PUZZLES
Book #3: Easy - Medium SUDOKU PUZZLES 3
Book #4: Easy - Medium SUDOKU PUZZLES 4
Book #5: Easy - Medium SUDOKU PUZZLES 5
Book #1: Hard - Extreme SUDOKU PUZZLES 1
Book #2: Hard - Extreme SUDOKU PUZZLES 2
Book #3: Hard - Extreme SUDOKU PUZZLES 3
Book #4: Hard - Extreme SUDOKU PUZZLES 4
Book #5: Hard - Extreme SUDOKU PUZZLES 5
Book #1: Medium - Hard SUDOKU PUZZLES 1
Book #2: Medium - Hard SUDOKU PUZZLES 2
Book #3: Medium - Hard SUDOKU PUZZLES 3
Book #4: Medium - Hard SUDOKU PUZZLES 4
Book #5: Medium - Hard SUDOKU PUZZLES 5
Book #1: The Murder Mystery at Darkwood Castle