The Demon Headmaster Takes Over
Gillian Cross
It seems too good to be true-the Hyperbrain:a super intelligent computer that works by accessing the human brain. Dinah thinks it’s an incredible invention. However,someone wants to use the Hyperbrain for other things. . such as accessing people’s minds and taking control of them! It can’t be the Demon Headmaster, because he’s gone. Isn’t he?
Reviews

I liked all the characters equally. I would recommend this book to someone else.
Lady Sapphire Sequins 11.08.2021

Still answers no questions about the series as a whole. such as: what would the headmaster do with the world, why he exists and where he got his powers. The story and plot is really good and worth reading but still is irrelevant compared to some of the other books in the series.
Commander Pluto Lavalamp 20.01.2021

Great
Superintendent Leach Spaceship 14.09.2020

I liked the book because it was so scary and there are so many twists. In the book the demon headmaster tries to take over the world.
Professor Honeycomb Sunshine 04.08.2020

The cliff-hanger had me shook. My muscles were tense as I flipped through the pages dying to know what would happen next.
General Sapphire Luther 13.07.2020

Amazing book. Can't stop reading..........,
Anonymous 16.08.2019

The demon headmaster is scary hes like a invader of planet Earth he electric you with a hat and you go fizzing around everywhere and he watches you get inaded
Lieutenant Tyler Bojangles 21.08.2018

gillian cross rules
Anonymous 24.03.2015

Nicely written with an interesting story.
Anonymous 14.07.2014

It is so good and gets you guessing the whole way through!
Anonymous 24.06.2014

It is so cool!A
Anonymous 23.06.2014