I bought this first from Steam and then used GoG Connect to have it on my GOG library. I just found out the Steam version doesn't have the e-book.

Question: Can you download just the e-book?

Because I don't want to download the entire game again just for the PDF if it can be helped.

If not, well it's not the end of the world; I'll DL the whole nine yards. :D

So . . . can you download just the e-book?

You can find "The Witcher Story" among the game's goodies.
You can download it directly from your library or using Galaxy, without downloading the whole game again.