This is book 4 of the Mortal Instruments series.
When reading these books I am reminded of how frustrating teenagers are. I think back to myself during my teen years and compare my non-communicative self to the non-communicative characters and realize Clare has accurately depicted teenagers.
The harrowing saga continues and Clary and Jace still can't seem to just say what they think and/or feel. Neither can any of the other teen characters. Again, the adults are practically non-existent in the adventures. I have to think that if my child had been in such harrowing and life-threatening situations, I would keep a tighter rein for awhile but that just isn't conducive to the plot.