90 books
Sudoku Easy Book 17
Sudoku Hard Book 21
Sudoku Medium Book 22
Sudoku Medium Book 21
Sudoku Medium Book 23
Sudoku Easy Book 8
Sudoku Easy Book 19
Sudoku Easy Book 1
Sudoku Hard Book 17
Sudoku Hard Book 29
Sudoku Easy Book 10
Sudoku Hard Book 6
Sudoku Hard Book 8
Sudoku Easy Book 3
Sudoku Medium Book 3
Sudoku Hard Book 9
Sudoku Hard Book 15
Sudoku Hard Book 26
Sudoku Medium Book 10
Sudoku Easy Book 2
Sudoku Hard Book 11
Sudoku Easy Book 30
Sudoku Easy Book 23
Sudoku Easy Book 6