My editing/proof copy has arrived, and hopefully I'll have a final version in a couple of weeks.
In the meantime, I had a first stab at designing a cover - thoughts? I'm worried that it's screaming out "needs more unicorns" - and not in a good way...
- War in Heaven - Cover #1
The XKCD forums will be acknowledged again for helping me avoid any truly terrible science (although any half-decent physicist will be spinning (<S>) in his grave), so many thanks for all the advice and suggestions.