To be honest I can’t personally tell you really (maybe others here can?) because the greenskin lore just left me so cold I didn’t even want to read further at all really, and I tried to read bits of the rest of the book but I was already feeling like I didn’t care enough to get into it due to “my” armies feeling like they were done no justice at all.
The basic lore bits for each race is mostly just a list of unit descriptions though too, which is fine and can be useful at times, especially when I have no idea what some of the units, or any of the characters etc are, but the short paragraphs don’t really explain much either. A lot of it feels like a reference to something you’ve missed in a way. The best thing in the main book over the Gamers Ed for me is the spreads of model photos, which are as useful as a description as to what a lot of the units are anyway for me.
Don’t really want to rant against the book anyway, as I am obviously still interested in the game (& I don’t regret supporting it in a way) - hence why I’m here, but yeah, it just completely failed to interest me lore-wise, so the full book version really added very little for me.
I guess the most valuable thing in a way is that if I hadn’t got it, I would would always have been wondering what I was missing! So now I know, haha.