Arrived home from an English academy cleaning about two years ago.

I just read it. The synopsis on the back page tells just about a piece of the story, which is more about a detective investigating the unclear disappearance of a person than about a religious cult, although it is a key part of the plot, nonetheless.
I've found it an interesting read, although can not find the exact meaning of how it ends. Which is not a small thing for this kind of novel...

In La Mantequeria, during the meetup. I guess it will stay there...