That’s a book on migrations and deportations, not a book on casualties, it doesn’t seem to support a claim of “hundreds of thousands murdered” which you made in your previous comment, could you please elaborate?

Again, you’re conflating murdered with deported

It most certainly includes direct casualty numbers as well, for Poland and many other conflicts.

Great, please name one of them that doesn’t imply complete occupation of Poland by Nazis

I just can’t envision an alternative reality

Well, I think that's the main issue here. Siding with the nazis, attacking Poland in the rear when they were fighting the nazis, committing horrible crimes against the Polish population and POWs ... You really, really cannot imagine not having to do even one of those