Just like they say for a Wedding; “Something Old, Something New, Something Borrowed, and Something Blue” this book has a bit of everything. It doesn’t matter how smart you are, the important ingredient in solving these puzzles is being able to think particularly outside the box. BrainStrains: Power Puzzles: 240 Mind-Blowing Challenges are for all ages and anyone who picks up this book will find something to take their interest and quite easily solve. Answers are provided and if you get stuck on a problem, just look up the answer. Once you see how easy it was, you’ll gain confidence to try another. Like I said, it’s not really a matter of difficulty, but a matter of thinking. Many puzzle books scare off the neophyte but this book will encourage one to continue because in the end these puzzles are not really too hard. Some of these puzzles have been around for a long time while others are new. The printing, drawings and physical construction of this book is first class and will stand a lot of wear and tear if left around the cottage, john, den, classroom or whatever, for interest to everyone who is looking for a little entertainment. This book was put together by some of the best known puzzle creators around today. Sterling, the publishers, is one of the best and largest in the business of puzzle books and this book is indicative of their quality. You can purchase this book at Puzzle Master.