Readers can either dip into the book whenever the mood takes, or they can take up the ultimate test of mental agility. The puzzles are sorted into chapter accor

Have fun and power up your mind with these puzzles designed to boost your verbal and logic skills, plus test your IQ. Extreme Brain Workout is a series of puzzl

Sharpen critical thinking skills and power your brain—for life Think of your mind like a muscle. It must be exercised regularly to get stronger—and for you