Schmitz is one of the freshest science fictioneers around today and in this collection he has hit upon a winning device for unifying his work. His six tales all take place in 3500 A.D. and are about members of the Federation of the Hub. The Hub (of the Universe, that is) is an all-purpose convocation of the thousands of star-systems now inhabited by mankind into one civilized unit. The story is everything with Schmitz, the more ingenious the better, and features spacetime exploration, inadvertent time travel, overhuman intelligences, etc. What's fresh is that all the stories interrelate and the reader feels as comfortable in normspace as in an armchair.