So the only thing I could find as far as an update on the 14th book was this:

And I want to kill it. First of all, that maximum age up there should be closer to being the minimum, in my opinion. We have LITERAL DECAPITATED HEADS and SELF-INFLICTED DISEMBOWELMENT in this series and you want my little sister to read it??? No! First of all, she wouldn't be able to understand the symbolism of this remarkable book series, nor the depth of the love and trust and heartache and betrayal! So no, I don't want my sister to read it yet, and you might criticize me for it, but until she's in middle school, it is neither appropriate for her, nor will she be able to understand the depth of feeling that this series showcases.

Also, apparently we have unicorns, according to this categorie description. 😒 I'm not amused.

BUT at least we know that the new book will have 336 pages. :')