A mind-bending array of brain teasers, riddles, and puzzles to keep those curious minds spinning for months. More than 5,000 witty challenges. Whether you want to challenge your brain, exercise your mental agility, or occupy the minds in your car on a trip, this rich compendium of riddles, puzzles, and problems will serve you well. While our favorites among Kevin Brougher's Thinklers! are Position Puzzles, there are hundreds and hundreds of other ingenious perplexities to keep you and yours thinking. Great fun.