This is a pretty neat book written by Lawrence Krauss. Basically, it discusses some of the concepts and technologies in Star Trek based on our modern understanding of physics and our universe. It goes through and examines ways they might be possible, or reasons why they could never work. All in all, a very good book. Even if you're not into Star Trek, the concepts are interesting and you'll learn a good bit about the universe in which you live... There are some parts that might be a bit beyond people without much physics knowledge, but most of it is well explained on a level that anyone can understand.