Does Jonathan Morgenstern Die?

In his dying moments, Jonathan crawled ashore and used his blood to open a rift to Edom and called for his "mother", Lilith. Through this rift, several asmodei entered the world, one of which took Jonathan's body and brought it to an isolated cave.

Does Lilith resurrect Jonathan?

The demons then coalesced into Lilith, and she was reunited with her "son". Bent on resurrecting Jonathan, Lilith set herself up in an abandoned cathedral in New York where the energy from the ley lines are strong.

Is Clary's real brother dead?

Clary didn't know she had a brother. They then discover that Sebastian was actually a spy for Valentine when he turns on them and kills Max Lightwood, Jace's adopted younger brother. ... Jace then stabs Sebastian in the back and he falls onto the riverbank, and dies.