Oh! I'll fix that, probably later (or never, if I forget).
Did you think that I was talking about the known ninja and sensei in the beginning or did you see through my evil plot to trick my readers?
As I've thought of it, this story will have Part 1, which will be about the First Spinjitsu Masters and the Overlord and Part 2, which will be about Garmadon and Wu (and Misako) in their youth.
After that, there is the story I think I'll name "The Stone Wars", also consisting of two parts (or two books), which will be with the known characters. But especially in this last one, I don't think I'll consider a great part of the series canon for these. Probably, none of the seasons after the Overlord defeat (first or second I'm not sure, yet) will be considered canon and there are bits in the previous seasons, like this time travelling stuff, I never liked and which creates a problem with my stories.
There are also two LU Ninjago stories, much more related to the series than these.