In a special edition of the programme and to celebrate Children's Book Week, Mariella Frostrup travels to Oxford to explore the city's rich history of producing giants of children's literature, from CS Lewis and Lewis Carroll to Philip Pullman.

Mariella Frostrup also visits Oxford's recently refurbished Story Museum where she is joined by pupils from the William Fletcher Primary School to walk around a new exhibition - 26 Characters - which sees many of Britain's best loved storytellers transformed into the characters they most loved as children. Meanwhile, authors Philip Pullman, Katherine Rundell, and publisher David Fickling discuss the current state of writing for children and ponder if there's something magic in the Oxford water. Show less