Sudokus are the ever-popular number placement puzzles that can help give your brain an excellent workout.

Sudokus are the ever-popular number placement puzzles that can help give your brain an excellent workout.

Spanning a number of difficulty levels, this collection of more than 500 puzzles is sure to keep you entertained for hours.

• EXERCISE YOUR BRAIN : Give your mind a great workout as you pit your wits against these number-placement teasers.

• REDUCE STRESS : Feel your stress melt away as you focus on these satisfying puzzles.

• OVER 500 PUZZLES AND SOLUTIONS : This bumper book of puzzles will provide hours of entertainment.