"Setting is more than the location in which your story takes place. It’s all the external elements that affect your characters and their goals and objectives. If you treat your setting as an additional character, chances are your story will be fully developed."
From a post by Joe Moore over at The Kill Zone. This is snipped from the end of a longer post on setting. Setting is something I've been thinking about a lot as I've started writing And the Signal Fell Silent. Trying to keep in mind that some time has passed between books so things are going to be a little different in New Eden.