How many books are there in the Mortal Instruments series?

-I know there are 4 but is there a 5th or 6th one?There are four right now, but there are two more on the way.



They are in order (Including the ones that are already out):



City of Bones

City of Ashes

City of Glass

City of Fallen Angels

City of Lost Souls

City of Heavenly Fire



Since the last three books were written (or will be written) mostly to cash in as much as she could from the series, I wouldn't put it below Cassandra Clare to write even more, so I guess we'll see how much she can milk the series.