Berserk is a 2007 young adult novel by Ally Kennen.

It was shortlisted for the 2008 Manchester Book Award[1] and longlisted for the 2008 Carnegie Medal.

He impersonates his mother and writes to a man, called Lenny, who is in a death row in the USA, because he allegedly had killed a teenager.

Just before Chas was released from prison, he is told that Lenny was acquitted because of the absence of proof and that he is on the way to England.

What started as game evolved into a nightmare: Lenny wants to pay an old bill.