It's not the last one. Five's out, six is coming out in November, that's a single chapter, and then seven is the big horrifying one. And I think a couple after that to wrap the thing up.
In my dreams I hear again the crash of guns, the rattle of musketry, the strange, mournful mutter of the battlefield.
And I'm sure after Facebook it will be the little cameras that we have implanted into the palms of our hands and we'll be debating whether we should get them, and then we'll all get them.