I so loved this book. I don't recall reading it when I was a young adult. I liked the layout of the book with its mixture of comics, scientific simplified articles and puzzles. In the footer of every odd numbered page there is an information under the name of Flash encyclopedia and these information are all under the same subject. And on the even numbered pages the footer are of a wise line that fits all ages. I liked that the characters are genuine and not adapted from any place.