One of the things that I've always loved about sci-fi (I guess it is "speculative fiction" these days) is the incredible world building, seeing where authors see our world (or others) being in a hundred or a thousand years. It can be fascinating stuff. What has always bothered me, though, about most "mainstream" sci-fi is the conspicuous lack of gay characters in these future worlds. It is almost as if we don't exist in the future. Now, granted, literature tends to be more inclusive than movies or television shows, but still, even literature is just as guilty most of the time.
Ann Somerville not only gets it right with Interstitial by including gay characters, but she makes them the protagonists! Can I get a cheer? For a change, readers get more than stereotyped minor gay characters. We get fully rounded human beings who are the focus of the story and who just so happen to be gay.
Somerville gives us wonderfully complex characters in a richly detailed future. We have some very cool technology, a ship captain carrying all the baggage of his recent divorce from his husband, a cocky co-pilot who is smitten with him, and the female friend and co-worker who just so happens to have had a romantic relationship with one of them. Add in some witty and smart dialog, a menacing space monster, and a life and death struggle for one of the characters and you get a great romp through interstellar space. These are characters that go beyond the archetypes of sci-fi. It's fun and funny and romantic. Characters I'd gladly visit with again.