Colonyship 27 is a unique mixture of good hard science fiction with erotic lesbian romance and explicit sex. Halfway through its 250-year voyage to Gamma Leporis, it is entirely populated by women, since guys have proven to be far too much trouble for long space voyages. Our narrator, who is never named, still has a great desire for a man, but she discovers that women lovers on the ship more than fulfill her every desire.
Later an alien signal is discovered. The heroine discovers that the signal might in fact be a rescue vessel, a Faster-Than-Light Earthship that was developed when the colonyship was already well under way. It would shorten their voyage, but getting together with it proves a daunting problem.