Move over the 'selfie' – the popular self-portraits of celebrities and everyday people which go viral on social media.

%image(14980753, type="article-full", alt="Students from North Walsham High School match the teachers to the books at the World Book Day "Shelfies" event")

For a new concept – the 'shelfie' – has been invented at a north Norfolk high school to celebrate the world of books.

%image(14980754, type="article-full", alt="Head Caroline Brooker's "shelfie" picture for North Walsham High School's World Book Day event")

It is a snapshot of someone's bookshelf, in this case teachers at North Walsham High.

And students were given the challenge of trying to guess whose books they were as part of World Book Day.

The quirky way of marking the day – a Unesco designated day designed to get young people reading – was the idea of appropriately named English teacher Sarah Read, who said it created quite a buzz in the school's classrooms and corridors.

'We were trying to think of a fun way of marking World Book Day,' she said. 'The whole selfie thing is very current on social media, so we dreamed up the shelfie idea to tap into that, and create something which would resonate with the students.'

The pictures showcased reading tastes ranging from Karl Marx to Bridget Jones.