Puzzle lovers will adore this wonderful collection of the ever-popular number placement puzzles. It spans a number of difficulty levels so users can improve as they go and give their brain a great workout. This collection comes in an elegantly designed package with gold foil embossing making it perfect gift. – EXERCISE YOUR BRAIN: Give your mind a fun workout as you attempt to complete all of these number-placement teasers. – REDUCE STRESS: Let go of the cares of the day as you focus on the puzzles at hand. – GIFT EDITION: Designed with a stylish cover, this collection would make a wonderful gift for all puzzle fans.