Mod loader

Forge

Minecraft version

Any

Patchouli version

Any

Modloader version

Any

Modpack info

No response

The latest.log file

N/A

Issue description

as title

Steps to reproduce

No response

Other information

No response

Interesting.
Just stumbled upon that command when reading the /help on my server.

And this Github issue is the only occurrence available on Google for "open-patchouli-book"