Probably the only way Mr Blish could have made the title anymore self-explanatory would be to call it "Cities in Space" but that's not really as poetic. Mostly due to that teeming mass we fondly call pop culture, if you've heard of James Blish at all it's probably by way of his novelisations of Star Trek episodes, which is where I first heard of him (and they really aren't half bad, honestly) but as it turns out he was one of the smarter SF writers of the fifties. His SF reputation basically rests on two novels, A Case of Conscience (which is a decent examination of original sin from a SF perspective) and the collective groups of novels known as Cities in Flight, which we'll be talking about here. Over the course of time Blish wrote four average sized novels depicting over time man discovering the ability to launch entire cities into space and the culture that developed around them as the centuries wore on. The first novel "They Shall Have Stars" mostly serves as a really long prologue to the proceedings, showing how the technology was developed, as well as the secret to halting the aging process, indispensible to staying in space for a really long time. The story also functions as a political thriller on some level, showing the earth of the future as more narrowminded and religious (always an easy target, alas) and focused more upon itself, crumbling even as he moves forward. Still, it's really just prelude for what's to come. "A Life for the Stars" is next, and is basically a better introduction to the culture of the flying cities, as they weave their way through space, taking odd jobs. Blish does a decent job making a somehow plausible stab at what a wandering space culture would be like, although I do have to agree that he rarely gives you a sense of the massiveness of a city and all the people inside it, instead focusing only on a small handful (I mean they're on NYC, for pete's sake) which takes some of the epicness away from it, although the fact that it's a giant city rocketing through space helps. "Earthman Come Home" is probably my favorite of the group (and it's the longest) focusing on the mayor of NYC, John Amalfi (who was glimpsed in the last novel but takes center stage for this and the next one) as he deals with some crises over the course of a novel, showing the downsides of a wandering culture (what if there's no jobs?) and what drastic actions those people might take, it's the widest ranging examination and description of Blish's future history. The last novel "Truimph of Time" mostly ties things up, bringing the crew back one last time after centuries have past to deal with the one thing they'll never be able to deal with and wrapping up things nicely, on a real poetic note. Blish's novels are hugely readable and move at a good clip, the characterization isn't what it could be (a common complaint for fifties' SF, since putting the idea forward was more important) and since the novels were written so long ago some of the science is suspect (a lot is outdated and the rest is just babbling) . . . also, the novels sometimes act more like collections of short stories, as the city moves from one unrelated crisis to another. But in terms of ideas and scope, Blish was standing nearly alone and I have to admit I have a fondness for the type of SF that liked the idea of strapping giant engines onto things and sending them into space. Sure it's not as graceful but it's much for a better mental image. If you're looking for cutting edge, sophisticated SF for the new century, this probably isn't what you're looking for, but for those who like to see one man lay out wild ideas in a calm, level fashion, this is probably some of the best stories you can get from this era and well worth the look.
