Freya Herondale

After everything that had happened, Freya felt free. She thought everything was back to normal.
Jace had proposed to her, she had finally become close friends with Isabelle, and Valentine no longer bothered anybody. Hidden secrets about the truth behind Jace's proposal, as well as what the clave has been up to, is suddenly exposed. Is she ready to face reality?
Her brother, Jonathan Morgenstern is after her and seeking revenge for what Freya and her friends had done to him. They'd gotten in his way too many times, and he couldn't allow this to happen anymore. He couldn't stand getting constantly thwarted by his younger sister.
What desperate measures will Jonathan go to, to ensure that Freya and her friends will suffer just like he did?
Is this the end for Freya?