The names of the girls are: ANABEL, CHANDRA, KAREN, LILY, MAIA, MARGARET, PENNY, and they will each be in charge of taking notes on a certain subject. They learn the ropes and basically the system works perfectly, just like Glenending had hoped. But because the girls are isolated from the rest of the world, they sort of have some weird ideas about how the world works. They develop this idea of a person named ROSA, who they think of as their mom, out in the world, someone who cares about them. Sort of like their God or Mary in a way, I guess. (Just interpreting.)
So the girls grow up, and along the way Anabel commits suicide, and then the girls start developing The Plan. We don't know what that is yet.
(I tried rearranging the girl's first initials into an anagram of some kind, but it did not work out as anything in English. I figure this book must have some secret codes in it somewhere, but I don't know.)