The top of the page when viewed upside down reads: "all will die unless they gather". On the bottom, the word down is upside down (probably a hint for the top message) and the rest of the bottom reads either "page C" or "page 0". This is very strange indeed, I'm glad you shared this.
Curtain beat me to it.
Forgot to note that "page C" could also be "Caged" upside down, but that may be over thinking it.