Kaza has tweeted saying she has started book 5! :

Follow Kaza Kingsley here,  Follow Port-O-Door.com here

That’s right, we now have a Twitter account! Please, follow us if you use Twitter. It’s a way to tell you when we’ve updated. Just go to www.twitter.com/PortODoor!

Check it out:

Follow Kaza on twitter here
http://twitter.com/kazakingsley