Two weeks in London! Sounds cool, right? Well, it's not if your name is Kai, like mine, and if you're constantly pursued by a walking nightmare named Coolman. Who is Coolman? He's the one who always – and when I say always, I mean always – knows everything better than anyone else. Although he wasn't to blame for us not staying in London, he was to blame for us going from one disaster to another. And that's despite the fact that I had to unmask an impostor! But, of course, for Coolman, it's nothing. Or at least that's what he says...

• Author: Rüdiger Bertram
• Illustration: Heribert Schulmeyer
• Recommended age: 10 years and up.