Before leaving my room on Friday morning, I slip all my books under the bed.

Hailee leaves with Thomas, almost everyone leaves too, outside. It's just Ben, Noemy, Zach and me.

I think I should show you something, I tell them, not too loudly.

Zach raises an eyebrow.

Not the book. Something else. More serious.

We'll meet you in your room in five minutes? suggests Noemy. I just need to ask Marc something.

That's a good idea, there shouldn't be anyone upstairs now. I'm just going to see where the others are and I'm coming too, Zach said.

See you in five minutes then, concludes Ben.

I go up the...