Why, Hello there! I already have a plan for the next book, and it will probably be the last one of the series. But, I dunno. At this point, I know about as much as you do to how many books there will be. So, mainly:

I know what the next book will be.

It will still be in this series book.

I don't know if there'll be one after the next book.

Aaaaaaand, That's it. XD. Expect something special.

Alex