I'm very new to the Warhammer 40K universe. I found a group that plays role games and I wanted to join that I felt I needed to learn the lore first.

I've been binge-watching lore videos on Youtube and BTH im hooked, I can see how similar it is to franchises that came after and were inspired by it, but at the same time is like nothing I've seen before. I actually love that there is not such a thing as a "good ending".

I wanted to ask people who know more about this universe than me, what is the worst thing that has ever happened in the universe? The most tragic event? The most disturbing one? I really want to know and read about it.

I wanna read some books but seems like ebooks are not available on my country, on Kindle it seems like they were purged and on Kobo maybe I could by them with a VPN or something.