It's gonna b gr8

Sally's off to Notley Castle, and she's promised to text Ben every hour - even if he is missing the trip because he's ill in bed.

I'm ready 4 u no what

She and Ben have a very special plan - and everything seems to be going perfectly. But then, suddenly, Sally's messages change.

It is right for the Master to rule the castle

What does that mean? What's happened? It's time for Ben to get out of bed and race to the rescue...

 
I read three of the Demon Headmaster boos when I was a kid, and when I saw this on Amazon for 99p I thought I'd pick it up and see if Gillian Cross was still dishing out the goods.