content: I picked this book up at a rummage sale to add to my little library of books. I didn't plan on reading it for quite awhile... until I learned that this book was banned when it was first published in 1932. This is scifi at it's best. There is a lot of scientific information, but not so much that the reader has to re-read every single paragraph to figure things out. There is a very easy to follow story with some great turns, interesting characters, and a picture that is built for the mind to see. I wouldn't recommend this to anyone under 17 due to the sexual nature of the book, but I highly recommend it to anyone looking for a really interesting read.