Brain Games for Adults: Mixed Puzzles and Smart Brain Teasers to Challenge Your IQ

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

Brilliant Brain Teaser Puzzles for Adults : 101 Games to Sharpen the Mind

Wrinklies Plethora of Puzzles: Brilliant brainteasers for mature minds

Hard Logic Puzzles & Brain Games for Adults: 500 Puzzles & 12 Puzzle Types (Sudoku, Fillomino, Battleships, Calcudoku, Binary Puzzle, Slitherlink, ... 3 (Challenging Fun Brain Teasers Series)

Big Book of Brain Games : a bumper mixed puzzle book for adults containing 300 puzzles

Brain Teasers for Puzzlers-Gareth Moore

Brain Training Puzzles For Kids: 100 of the best brain teasers w

Brain Games Puzzle Book: A Collection of Challenging Puzzles for Adults: Word Search - Crossword - Maze - Sudoku - Criss Cross

Binary Puzzle Book for Adults - 504 Puzzles - Easy to Hard: Critical Thinking Mental Exercise

Incredible 50s-90s Word Search for Adults: 100 Large Print Puzzles for Seniors, Adults and Teens with Curious Phrases. Word Find Book & Brain Games for Memory Training.

Number Games for Adults: Smart Puzzles and Brain Teasers to Challenge Your IQ (Brain Games for Adults)

The Big Book Of Mixed Puzzles For Adults: 365 Assorted Puzzles and Brain Teasers For a Year. Relaxing Large Print Variety Puzzle Book For Adults ... Search, Sudoku, Crossword, Mazes and More.

Naughty Puzzle Book: Cheeky Brain-Teasers for Grown-Ups

Word Games for Adults: Smart Puzzles to Challenge Your Language

Detective Logic Puzzles for Adults: 50 Crime-Themed Logic Grid Puzzles - Fun, Easy to Hard Logic Puzzles - Large Brain Teaser Book

Logic Puzzles for Adults: 50 fantastic logic puzzles plus 50 bonus assorted logical brainteasers

Mixed Puzzle Book For Adults: A Comprehensive Selection of Brain-Teasing Activities Designed for Relaxation and Enjoyment +100 Exciting Puzzles

Brain Games for Clever Dads: Mixed Puzzles and Smart Brain Teasers to Challenge Your IQ

Senior Mind Gym: Puzzles to Exercise the Brain,Kristy McGowan

Marvel Brain Games : Fun puzzles for bright minds

Logic Puzzles & Brain Games for Adults: 500 Easy to Hard Puzzles & 12 Puzzle Types (Sudoku, Fillomino, Battleships, Calcudoku, Binary Puzzle, ... Numbrix): 4 (Challenging Fun Brain Teasers)

Classic Easy Puzzles and Brain Games for Adults: With Word Searches, Odd One Out, Crosswords, Sudoku, Find the Differences, Mazes and More