Another really good far-future, post-apocalyptic story, but not simply a continuation of the first. It's the same characters, but it's a new adventure with new places and new faces as the world-building is fleshed out more. It also does a really good job of showing people dealing with death in various ways (imagined ghosts or shifting blame on others or denial that anything has changed); makes the characters more real to be reacting in realistic ways.

If you read & liked the first, then you definitely have to read this one too.