The Doomsday Club: Detention can wait. Saving the world comes first!

A monstrous portal opens, forcing Jack and Conan into mortal danger as they investigate.

Conan swallowed hard. The creature stood taller than the archway, a silhouette of darkness against the spiral of light behind it … And it looked directly at him.

Jack and Conan's friendship is officially dead. Stuck in detention with Yash and Jerry after an all-out brawl in the toilet, it’s a terrible start to sixth class. And that’s before they witness a monstrous beast step out of a portal outside their...