If I can question the premise a bit, there seems to be an assumption that books on math, physics, and chemistry in different earth cultures today – say, in China and France – are pretty much the same. Are they?
Maybe the answer for earth is yes. But even if so, in the solar system in a different galaxy, there could be – and I suspect are – big differences within that solar system. This would be especially likely if there are advanced civilization in different planets in that solar system, as could be true in ours just a few hundred years from now.
And even if everyone has books with pretty much the same content when at the same level of of development, if the other solar system was, say, a thousand years ahead of us, I’d think the books would be a lot different for that reason.