Sun of Suns

I finished "Sun of Suns" by Karl Schroeder.

Utterly brilliant.

It's a unique mix of swashbuckling adventure and extremely esoteric science fiction with a world set in a giant... um... balloon in space. The balloon world of Virga is heated by a series of artificial suns and...

Well, it gets complicated. There's pirates. There's naval-ish battles. There's revenge. There's redemption. There's absolutely fascinating characters.

It's good clean fun.

And there's pirates.