Alphabetic Sudoku Puzzles for Adults: EASY, MEDIUM, HARD, BOOK 1, 60 sudoku puzzles, difficulty 20-50, difficult sudokus, solutions for all puzzles, activity book for adults teenagers puzzles brain training, letters, alphabet, not numbers

Maze Puzzles for Adults: BOOK 2, 60 mazes, difficulty 50-90, hard, ultra-hard, extreme, very difficult mazes, solutions for all mazes, activity book for adults teenagers, challenging puzzles, brain training

Maze Puzzles for Adults: 60 mazes, difficulty 10-30, easy, medium, semi-difficult mazes, solutions for all mazes, activity book for adults teenagers puzzles brain training

Maze Puzzles for Adults: 60 mazes, difficulty 10-50, easy, medium, hard, difficult mazes, solutions for all mazes, activity book for adults teenagers puzzles brain training

Maze Puzzles for Adults: 60 mazes, difficulty 30-50, medium, hard, challenging difficult mazes, solutions for all mazes, activity book for adults teenagers puzzles brain training