Physics of the Impossible by Michio Kaku

For fans of science fiction Physics of the Impossible is a big help in separating the currently possible from the "could be done" and the "maybe in another century or two" and the "never happen." To do this, Kaku describes state-of-the-art physics with regard to force fields, invisibility, teleportation, psychokinesis, extraterrestrials, UFOs, time travel, and other subjects. It is all buttressed with historic background in physics written in a clear and entertaining style. Good read, even if you're not especially into science fiction.