The runaway success of Tracy Beaker author Jacqueline Wilson has demonstrated a huge appetite for children's books that confront difficult social issues, so it is understandable perhaps that writer and illustrator Ana Fischel has decided to address controversial subjects such as abuse in her books.

However, a collaboration between Fischel and the charity ChildLine appears to be taking the idea a step further. Fischel, who is about to publish the second title in her series of seven fantasy adventure books, The Zartarbia Tales, says it makes sense to offer those children reading about issues such as abuse or eating disorders (both featured in her books) somewhere to turn to if they need it.

ChildLine's helpline number will in future be printed inside Fischel's book covers "so kids can call trained counsellors if they need to". The number will also appear on promotional materials, and the books will have practical information for parents, telling them how to donate to ChildLine or volunteer.

"ChildLine is such a vital organisation for any child in danger or worried about something," Fischel says. "By collaborating with ChildLine, we hope to raise as much awareness for the helpline as possible."

Fischel, whose books are aimed at 10- to 14-year-olds, knows that writing about controversial subjects for children is often difficult.

"I am extremely aware of having to be very sensitive when dealing with such topics, but equally the fundamental message had to be clear: abuse is not acceptable," she says. "This is why the characters and scenes involved had to be believable."

Explaining her motivation, she adds: "Being a mother, and having experienced abuse as a child from a family member and also at school, I felt that abuse was an essential issue that should be raised in a format children could identify with."

But Fischel says the key to her work is making it accessible and enjoyable for all children. "It is important to point out that for children who have safe and happy lives, The Zartarbia Tales will be read as an exciting and magical adventure. But for children who are not so lucky, they will be made aware they can seek help through ChildLine."

Natasha Finlayson, director of communications and policy at ChildLine, says: "Ana wants to help children through her books as well as entertain them. The world of The Zartarbia Tales, among other things, contains danger, risk and people with malign intent.

"We hope that raising awareness of ChildLine's service through the books will provide a source of help and support to children who recognise in Zartarbia elements of their own life."

Details: www.zartarbia.com