Unusual weapons lie at the heart of Iron Sunrise's complex plot. Someone has destroyed a star, and the planet Moscow. Its core iron-bombed, the star supernovas - leaving a widening circle of destruction. Moscow's revenge weapons, relativistic missiles, have launched, headed for its nearest rival New Dresden. It's a one way ticket unless three of Moscow's ambassadors send the recall code. It's just a pity that someone is killing them one by one...
Just over 3 and half light years away from Moscow, the space station of Old Newfoundland 4 is waiting the radiation wavefront, and its own doom. An evacuee gothette is being hunted by dogs, as she's found something unusual instead of boarding her ship. Wednesday is a bearer of secrets, secrets that someone doesn't want to be heard. The Eschaton is trying to find out who killed Moscow and why, while Wednesday is just trying to stay alive. Toss in Rachel and Martin, sent by the UN to try and find out who's killing the diplomats, a gang of heavies from the Re-Mastered Race (a bunch of nasties who want to kill the Eschaton to instantiate their own version of the Singularity), along with an old warblogger (a cross between Spider Jerusalem and a Christopher Brookmyre character) who's on the trail of something big. Mix them all into a single space liner, and you've got the recipe for a caper thriller Stross style.
Stross gives us a complex, many-layered story, peppered with memorable characters, and a fast moving plot. Unlike most space opera, where the fate of the future hangs in the hands of one man, Stross' characters are concerned with preserving the status quo. This is the best of all possible worlds, and they'd like to keep it that way, thank you. Even it means making unlikely alliances along the way.
Another recommended read.
[Insert usual Stross disclaimer here. Oh, and note that I was an early reader and sounding board for ideas, so my name's in the front of the book...]