This book is enjoyable and brief, while the ideas remain relatable and easily digestible. I'd suggest this to either a grade school student to foster their interest in the ways the world works or to an adult who's rediscovering what they'd lost to the sands of time.<br><br>Scientific knowledge covered in this book is still useful, mostly because of the author's easily understood style. He's like one of those really good, easily relatable teachers that you find every once in a great while. If you'd like a taste, you can find videos of him lecturing online.