Privatizing bits of the prison industry was a step in the right direction, but what we didn’t have — until recently — were proper instruments for incentivizing the judiciary. That’s what the “kids for cash” judges were apparently experimenting with.

Today the do-gooders revile those efforts as “kickbacks,” but before long we will see them as legitimate tools of justice. Our laws governing lobbying and campaign contributions have struck the right balance between the wishes of the people and those of private industry, so why are we so quick to doubt that the same great results can be achieved by putting the government’s justice-dealing branch on the same market-based course?

It sounds unlikely but, according to Perera, it is well-established that juveniles have been held at Guantánamo, although the numbers are disputed. Reprieve, the charity for prisoners from death row to Guantánamo, has recorded that 22 under-16s have been held at the camp. The youngest juvenile still in custody is Mohammed el Gharani, who was 14 when picked up in a random raid on a mosque by Pakistani bounty-hunters and “sold” to the American authorities for $5,000.

It was stories like these that Guantánamo Boy is based on, although the book itself emerged out of just one line delivered by the human rights lawyer Clive Stafford Smith at a benefit event for Reprieve in 2006.

“At that gig Clive Stafford Smith simply said ‘children are also held in Guantánamo Bay’ and that one statement inspired this novel,” says Perera.