Kaza has tweeted saying she has started book 5! :

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http://twitter.com/kazakingsley

Today is Kaza Kingsley’s birthday! We here at Port-O-Door just wanted to say a few things.
Dollick: Happy birthday! I just wanted to say thank you for all you’ve done, these books really lift the spirits of kids everywhere! You are an amazing author, and here’s to you!

Spartacus Kilroy: Happy Birthday Kaza!!! You [...]

Ahhhhh! Like water in a dry desert… WE HAVE NEWS! Kaza has informed us that she has been very busy lately and that she loves the new site she also said:

The latest is that edits are nearly done for Book Four. The title of that
book is called The Three Furies. I’ve already given suggestions for [...]

Yes, you read right, Kaza Kingsley has sent in the first round of edits of The Three Furies to Simon and Schuster. The book is due to come out in 2010, so it’s moving ahead right on schedule! She’s been deep into edits for a while now, so it’s nice that she’s finally able to [...]

Kaza has finished writing her 4th book : The Three Furies! It is  being edited. It should be released sometime next year!! ^_^

As we all know Kaza Kingsley has been looking into the posabilaty of making Erec Rex in to a magor motion picture. And now Erec is getting closer and closer to the big screen because Kaza has chosen an offical movie agent by the name of Joel Gottler! Right now I have found no pictures [...]

Kaza herself announced on the Erec Rex forums that Erec Rex has been bought by Simon and Schuster, the publisher for The Spiderwick Chronicles. They have decided to rerelease the books by end of March early April. They have also decided to change the covers, which pushes the Book Three release off until late summer. [...]