The Books Charles Stross will not write, parts 5 and 6

Charlie Stross continues his exploration of the never-to-happen universes in his head. Here are his last two posts:

Part 5, where he describes his time-shifting military unit sub-genre idea

and

Part 6, dealing with Halting State variations

As usual, both are worth reading, although probably less interesting than some of the previous posts on the subject.