Brief Summary of "Clockwork Princess"

*Spoilers* Ultimately in the end, Will does save Tessa and we find out that Jem had not died after all, but that he became a 'silent brother', basically the doctors and priests to the Shadow hunters, which caused the parabatai bond between him and Will to sever. Also, Mortmain is killed along with his army of robots that tried to destroy the Shadow hunters. Will does go into a period of depression after realizing that he and Jem may never see each other again, considering it was his best friend who he thought died, but is later out of his depression and then he and Tessa get married. I later read in the ending that Will dies, but since Tessa is immortal, and Jem also becomes immortal. They run into each other in present day London and catch up with each other, considering the last they saw each other was during the late 1800's in London. This is basically how the book ends and how the characters are affected.