Dave is going to kill me. Every inch of the walls in his 'office' is covered in post-it notes, a different colour for each subject. I've tried to do it according to book colour, but it didn't go exactly as I planned. The English ones are a strange beige colour because Biology got the green, the Maths ones a pink-brown because Chemistry got the pink. But it's good. I stick the final neon purple post-it onto Chris Hemsworth's face on the Avengers poster and stand back.

Perfect.

"Eve!" Dave shouts from downstairs.

He can't possibly be angry about the post-its on his posters, I've just stuck those ones on. And he told me, the revision that worked for me was fine by him as long as I kept the office neat. And Dave doesn't shout unless it's urgent.

"What?" I call back, opening the door and leaning out into the hallway. "Dave!"

I sigh and walk into the hallway, making my way at the top of the stairs. There he is, my stepdad is standing in the downstairs hallway on the landline. Who calls the landline anymore? Advertisers who I enjoy hanging up on, school when they want to complain or wax lyrical about me or Alfie, the opticians for remind Mom to book Alfie's appointments. He had one last week, school wouldn't be calling on a Monday morning of a teacher training day and Dave wouldn't be talking to an advertisement person.

"It's for you," he whispers. "Hang on, I'm giving it to her now."

"Hi," I say into the receiver.

"Eve, hi," the person on the other end answers. "It's Eden."

"How do you have my landline?" I ask. "I swear you have my number."

And even if she didn't, it's not exactly sacred knowledge. A quick text to anyone in our year to ask if they had my number and they'd sent it over without question. Maybe a quick text to me explaining what they'd done but nothing major.

"It's about our deal and how I got your landline isn't important, but if you must know it was in my mom's address book," she says.

"What deal?"

I'm glad Dave has walked away, to continue doing whatever he does in a suit shirt and pyjama bottoms in our kitchen because I've just remembered. All the memories of that awful cover lesson have rushed back to me and I remember. The murder deal. I kill Granger, she kills Josh.

"You didn't," I say just as she's about to reply. "Eden! I'm calling you back on my actual phone."

"No, don't!" she protests. "Listen, I told your dad that I wanted to check some History stuff with you but meet me by the river, okay?"

We said that Josh could fall from the rocks and hit the river and die. She wouldn't. She couldn't, could she? But what do I know? I barely know this girl, for all I know she could be a raging psycho I set on the warpath.

"Get a fucking life, Eden," I say sharply. "That whole conversation? It was a joke. As if I would want Josh dead, everything's fine between us."

The comment he left on my latest Instagram post where the caption read GCSEs will kill me comes to mind. You'll do great Eve, don't stress it too much :) was polite and nice and friendly. And the conversation that followed, nearly an hour of DMs was almost like old times. Almost.

"You're the one who brought Josh up!" Her voice is getting higher now, more panicky and worried. "If I could risk this, then you can risk Granger."

"You're kidding," I reply, lowering my voice so Dave won't hear. "Eden, that was a joke. I didn't mean that you should actually go push him off the rocks!"

"Well that's what happened." A pause. "We didn't have this conversation, you hear me?"

"Get a goddamn life, Eden," I snap. "And for the love of God, stop watching true crime documentaries."

I hang up.

She couldn't really have killed Josh, that's insane. He was posting on his story just an hour ago, snaps of his revision guides and that stu-dying gif that's appeared in my regularly used. He can't be dead. So I text him.

you ok?

It's been delivered.

It would be slightly creepy to wait for him to reply, right? To reply within seconds when he does see the text and answer.

But the longer I wait, the faster my heart beats.

Eden couldn't have really killed Josh, right? She wouldn't be so insane that she would lure him out to the bridge and up to the rocks and give him a shove. And he wouldn't be so stupid to mindlessly follow her.

Right?