Dalton Gamroth There are supposed to be 4 in total, Libba Bray has said. But from the looks of it, we'll probably all be dead by the time book four is released haha!
Alissa The author says (several times) on her blog that this has been an exceptionally difficult book to write (among other things). But the last time the blog was updated was almost a year ago. Perhaps she is still ironing out the details of the story?