Alastair Reynolds has impressed me with his intellectual sorta-hard-SF space operas, but left me a bit cold in terms of characters and storytelling, the grand scope of his plots dwarfing the human elements. He's a bit like a colder Charles Stross who is not trying quite as hard as Stross does to impress you with his cleverness, even though he's very clever.
Terminal World is a departure from his usual space operas - it's set on one world, that vaguely resembles Earth but isn't, in a post-apocalytic far future. The setting is kind of steampunkish, but steampunk done in a hard-SF way, and more post-human than the usual pseudo-Victorian frippery.
Quillon is a doctor living in a city called Spearpoint. Spearpoint is, as its name implies, a towering sliver of civilization stretched up into the atmosphere, surrounded by a wasted, cold and drying planet. Spearpoint is divided into "zones" that determine what technology works there. At the highest levels are the Angels, who still enjoy advanced technology, while at lower levels are places like Neon Heights, Steamville, and Horse Town. Some places, electronics stop working. Other places do not even allow internal combustion. And there are some zones where even humans can't survive.
At first, the characters seem mostly uninterested in how this state of affairs came to be, because apparently it's been like this for thousands of years, and is now the accepted status quo. Indeed, we learn that despite the obvious remnants of what was once a great, highly technological civilization, most people have little awareness of history or a world beyond their own.
It turns out Quillon is an Angel, or a former Angel. Angels can't normally survive in the low-tech lower levels, but he was part of a special infiltration project that went wrong and left him isolated among hostile humans (or "post-humans" as the Angels call them). When the Angels come after him, he goes on the run. His flight eventually takes him out of Spearpoint altogether, and across the wastelands which are occupied by Reaver-like "Skull-boys" and a rival civilization known as SWARM that exists entirely in the air, aboard a great fleet of zeppelins.
So, Reynolds manages to give us sky pirates and zeppelin battles, and a world-saving adventure that does not really uncover the secret behind Spearpoint and its world, but gives us a few glimpses. At times this felt like one of his epic space operas, albeit confined to a single planet, and at other times, it was more like a steampunk adventure. (Zeppelin battles!)
I liked Terminal World - it feels complete, even with a somewhat vague ending. Clearly Reynolds could write more books set in this world, but it doesn't seem like he plans to.
Alastair Reynolds is probably one of the smartest and best writers of hard SF and space opera today, the kind of SF that actually uses physics and big ideas. Unfortunately, his writing still lacks an essential something to make him one of my favorites - it's as if there is always a certain lofty distance between author and creation that one can sense in his work. His characters are intelligent and interesting, but they are largely plot puppets. Still, this was going to be "three strikes and you're out" but it was more of a base hit, so I'll keep reading him.