C. J. Tudor was born in Salisbury and grew up in Nottingham, where she still lives with her partner and young daughter.

She left school at sixteen and has had a variety of jobs over the years, including trainee reporter, radio scriptwriter, shop assistant, ad agency copywriter and voiceover.

In the early nineties, she fell into a job as a television presenter for a show on Channel 4 called Moviewatch. Although a terrible presenter, she got to interview acting legends such as Sigourney Weaver, Michael Douglas, Emma Thompson and Robin Williams. She also annoyed Tim Robbins by asking a question about Susan Sarandon’s breasts and was extremely flattered when Robert Downey Junior showed her his chest.

While writing the Chalk Man she ran a dog-walking business, walking over twenty dogs a week as well as looking after her little girl.

She’s been writing since she was a child but only knuckled down to it properly in her thirties. Her English teacher once told her that if she ‘did not become Prime Minister or a best-selling author’ he would be ‘very disappointed.’

The Chalk Man was inspired by a tub of chalks a friend bought for her daughter’s second birthday. One afternoon they drew chalk figures all over the driveway. Later that night she opened the back door to be confronted by weird stick men everywhere. In the dark, they looked incredibly sinister. She called to her partner: ‘These chalk men look really creepy in the dark . . .’

She is never knowingly over-dressed. She has never owned a handbag and the last time she wore heels (twelve years ago) she broke a tooth.

She loves The Killers, Foo Fighters and Frank Turner. Her favourite venue is Rock City.

Her favourite films are Ghostbusters and The Lost Boys. Her favourite authors are Stephen King, Michael Marshall and Harlan Coben.

She is SO glad she was a teenager in the eighties.

She firmly believes that there are no finer meals than takeaway pizza and champagne, or chips with curry sauce after a night out.

Everyone calls her Caz.

Looking back, it all started on the day of the fair and the terrible accident. When twelve-year-old Eddie first met the Chalk Man.

It was the Chalk Man who gave Eddie the idea for the drawings: a way to leave secret messages between his group of friends.

And it was fun, to start with, until the figures led them to the body of a young girl.

That was thirty years ago and Ed thought the past was behind him. Then he receives a letter containing just two things: a piece of chalk, and a drawing of a stick figure. As history begins to repeat itself, Ed realises the game was never over . . .

Everyone has secrets.

Everyone is guilty of something.

And children are not always so innocent.