Logic Puzzles for Adults: 50 fantastic logic puzzles plus 50 bonus assorted logical brainteasers: Media, Clarity: 9798654483621: Amazon.com: Books
Logic Puzzles for Adults & Seniors: 500 Hard Puzzles (Sudoku, Shikaka, Masyu, Kuromasu, Jigsaw Sudoku, Slitherlink, Suguru, Skyscrapers, Numbrix, Bina (Activity Book #4) (Paperback) | Murder By The Book
50 Logic Grid Puzzles | Hours of challenging fun | Logic Puzzle Book for Adults: Fun and Challenging Logic Grid Puzzle Book: Lane, Milliwood: 9798806815775: Amazon.com: Books