In Northern Ireland, from the late 70s to the early 90s, the IRA killed over 40 alleged informers.

But the man who often found, tortured and sometimes killed these people on behalf of the IRA

was himself an informer, a secret British army agent with the codename Stakeknife.

Who gets to play God? And why me? Why my family?

When lies are still being told to this day, who do you believe?

I wouldn't even know where to start, and I'm with the irony.

Steakknife. Listen first on BBC Sounds.

This is a download from the BBC. To find out more, visit BBC.com.ukuk slash radio four.

Hello on today's program with the arrival of a new genre of books for teens with often graphic sexual themes.

We ask if that's the draw for new adult fiction.

And with this year marking the 50th anniversary of the assassination of President John F. Kennedy,

we take a look at the literary legacy of his untimely death. First up, though, one of the names

featured on this year's Granta Best Young British Novelists, Evie Wilde. Her debut, after the

fire, a still small voice, was widely acclaimed for its richly textured prose

and narrative ambition. Evie's next, all the birds singing, surely confirms her place as a serious

talent. I rounded the bend of the pathway and stopped dead. A man stood in the shelter of the

hedge with his hands in the pockets of his jacket, staring straight ahead.

He had a silk scarf wrapped around the bottom half of his face and wore a suit.

His hair was plastered to his head and he had a polythene bag hanging around his wrist.

I kept walking as if I hadn't seen him, but clenched my fists until my knuckles clicked.

I could smell him like old vegetables.

All the birds singing, which tells a brutal story, slowly revealing in reverse order,

...