logic puzzle books for adults

Tricky Logic Puzzles for Adults: 130+ Difficult Puzzles to Challenge Your Brain

Puzzle Baron’s Logic Puzzles: Hours of Brain-Challenging Fun!

Brain Teasers for Memory Fitness: 90-Day Challenge to Strengthen Recall and Improve Cognitive Skills (Brain Fitness Puzzle Games)

Crossword Puzzles for Brain Fitness: 90-Day Challenge to Sharpen the Mind and Strengthen Cognitive Skills (Brain Fitness Puzzle Games)

Logic Puzzles Book for Brain Fitness: 90-Day Challenge to Sharpen the Mind and Strengthen Cognitive Skills Enlarged Print, Easy to Hard! (Brain Fitness Puzzle Games)