"From the beginning" is a pretty good order, but don't feel to constrained to follow any particular order. That's the nice part about AI to Zombies being divided into little chunks, with hyperlinks to things you might want for context. Of course, if you jump too far, you immediately fall down a rabbit hole of hyperlinks, but some would say that builds character.
Given that weekly open threads are a feature of the old LessWrong, let's try them here as well.
If it's worth saying, but not worth its own post, then it goes here.