There's a new, professionally-published book version of "There Is No Antimemetics Division" out as well[1], if you want to support Sam's work that way. I have print copies of both the self-published V1 and the new V2. I'm very excited about the latter, though I haven't finished it yet.

[1]: https://qntm.org/antimemetics

I really enjoyed one of their other stories - Ra https://qntm.org/ra