Brain-Busting Puzzles & Riddles (Professor Murphy Puzzle Book)

Easy Brain Exercises for Adults: 100 Puzzles, Memory Games, Math Riddles, an...

Professor Murphy's Brain-Busting Puzzles & Riddles: Over 150 Brain-Training

Professor Murphy’s 6 Metal Puzzles 30 Brain Busting Teasers Plus Mind Games Book

Professor Murphy’s 6 Metal Puzzles 30 Brain Busting Teasers + Mind Games Book

LOT OF 9: Vintage PUZZLE BOOKS Logic Crossword Brain Teasers Riddles MORE

Professor Murphy's Brain-Busting Puzzles & Riddles : Over 150 Bra

Edgar Allan Poe Puzzles Gareth Moore Mystery Brain Teasers Book Logic Riddles