Kelsey Hanson It is coming out this March 2017 in the U.S.!! I am so excited for this book I absolutely cannot wait. The last book had me crying for days!!
Lee Not soon enough! KB says her publishers need to schedule all the remaining stuff (including reading, edits and redrafts, I assume) so it may be a while yet. I'm guessing the end of the year :( Wish goodreads could launch a petition button or something so we could hurry them up.
Anthea All the books have taken between 3 and 5 years to come out. If she stays true to form, and doesn't get faster at writing the book, which she appears to be doing (the last 2 books were 3 and 4 years coming out), then it should be out around 2019.