I've been trying to stick to a schedule of posting each new chapter of APIT on Mondays, but Chapter 4 will be delayed by a few days. I need to go back and make a small change to be consistent with events in a later chapter. I'll finish writing the chapter I'm currently working on, and then go back and make the change.
Between now and mid-April, I might be hard-pressed to maintain a steady output of one chapter per week, as real life will keep me more occupied than usual. We'll see how it goes.
One of the things about writing a story like this one is the amount of world-building that needs to be done up front. That part of the story will conclude in Chapter 4. Starting with Chapter 5, the plot will start to kick in.
At this point, I have a pretty good feel for how the story will proceed and ultimately conclude. The story should end up being about 25 chapters long.