I was astonished that I could not send a prison inmate one of my books

Books represent a vital point of contact with the outside world

Chris Grayling has furthered angered the Lib Dems by announcing plans to draft new laws to curtail the impact of European human rights legislation on Britain (Matt Cardy/Getty Images)

I have been in regular correspondence with a man who is serving life for murder and I was genuinely astonished to discover that I could not send him a copy of one of my own books. The trouble started after he turned 18 and therefore graduated from the Youth Offending Institute where he had been held. Until then, I had sent him all sorts of things to read.

It seems to me that if we allow spite and small-mindedness to infect the prison system, then the whole system will be diminished and the good work done by prison librarians and educationalists undermined.

Books represent humanity and civilization, two abstracts which may be in short demand in the prison environment. As I have seen from personal experience, they form a vital contact with the outside world and it seems crazy that any government that promotes reading should seek to exclude one particular group. Yes – there are libraries but these are often underfunded and anyway owning a book has its own special value.

Conservative ministers such as Chris Grayling seem to think they can play to the gallery by being harsh when it comes to the treatment of prisoners. But education and rehabilitation have to be central to the argument: how else do you escape from the soaring reoffending rate with all the costs that it entails?

It’s small wonder that so many writers are disgusted by this measure. From a liberal perspective but also socially and economically, it simply makes no sense at all.

Anthony Horowitz is the author of the Alex Rider series of spy novels