Little Badman and the Time-travelling Teacher of Doom

I'm Humza Khan, the greatest eleven-year-old rapper Eggington ever had. I've also faced deadly alien slugs, killer aunties and double maths. But now, I (and my best friend Umer I guess) face something even scarier - my dad! He's pretty fed up with us being naughty, so he's sending us away... to school. But this is not ordinary school. This is a special summer school in Pakistan, and man something weird is going on - someone has been messing with time! I may have to save the world again...