Quite the worst sf book I've ever read. So bad, in fact, that it keeps you reading, much like the "device" in the novel itself - a teleport machine with a time lag. Eventually good sense catches you up. I bailed at around two thirds, where the former Soviet Iron Lady Captain is servicing or being serviced by her male harem crew. Sexist, racist; oh, and the aliens are sex-mad too. When they're not being stupid.