I disagree, this whole new plane of existence (basically heaven) was introduced out of nothing, without anything previously in the book hinting that something like that exists in this universe.
Tbh it felt like the author had written himself into a corner and made this up ad-hoc as a way to keep the story going.
It felt like a tie-in to some other thread in SCP canon, TBH. It's a pretty chaotic mix of ideas and stories, so it's something that fits but might have well been written by someone else in some other part of the wiki (chasing all of these is a time sink and a half, almost as bad as tvtropes)
Tbh it felt like the author had written himself into a corner and made this up ad-hoc as a way to keep the story going.