If you're writing a series that's set in a sci-fi or fantasy world, how much do you think you need to recap for each book?
When writing book 2, do you re-explain the more fantastic elements of the world, or do you assume that these are things the reader already knows? I suspect that, at the very least, you'll want to provide a bit of a refresher, but where's the line? You don't want readers to be confused, but you also don't want to tip over into tedium.
