The song: -Could be an expression of where she is at, my W did/does the same, many times I wonder/ed. That particular excellent song rings true to high schoolers/young adults still (per my oldest). And even to us oldesters in transition.
-Could just be just a song she likes, knows the words to, and can sing in key...W claimed this a few times when I asked (the song was "Someone I used to know", and a lot of Red Light Kings songs).
Fun (?) to speculate, but try not to read too much into it.
Sounds like she is really turned within, in withdrawal, re-read the stages of MLC here....
As for the book, check it out from the library and read it yourself, see what you think it might mean, then decide if you want to ask her.
Personally, I would let sleeping cats lay for a while longer. And that is what I am doing right now as my W is seemingly in a similar phase...
As always, YMMV...
T^2
In the depths of winter, I finally learned that within me there lay an invincible summer. - Albert Camus
Uncertainty is the very condition which impels people to unfold their powers.-Eric Fromm
