Thanks guys for clearing that up.
I wasn't certain how his stories were in the public domain in the US seeing as they use Live+75 like here in the UK. I wasn't aware on the rules around magazines.
So long as Spinnenmonat is in the US, they are safe to download them.
And I had no plans to redistribute them as there was no evidence I could find that said I was safe to do this. I'll just keep them to myself and enjoy them.