I just finished River Rats by Caroline Stevermer. It was even better than I'd hoped. She's got such a clean, elegant writing style--but the story is great too. Tomcat and a handful of friends live on the steamboat River Rat, which they pilot up and down the river, taking mail from town to town in barter for food and goods. It's twenty years after the Flash, and life is hard; but the Rats know how to handle themselves. Only when they break one of their own rules and rescue a man from the poisonous river do things start to go bad.
It's a fascinating book, and it's a fast read. I'm not sure which book I'll move on to next, but I'm glad I chose this one today.