im not sure at all,but i think it does because have te ever heard of an autore who lets te have a sneak peek at the successivo book, then they never write it? if te go to the infernal devices website it shows another book called "Clockwork Princess". i think even though it doesnt really mostra the book it does exist somewhere.i mean who gives previews of libri and then retires? its just so sad that i cant find it though. i would Amore to see if tessa and jem do get married o jem falls for wills sister.and if jem does falls for Cecile, than will tessa and will fall for each other?because if they(tessa and will)do get together than will jace herondale(mortal instruments)be their great great great grandson?