Guardian children's books podcast: Jenny Colgan writes Doctor Who novel

As a lifelong Doctor Who fan, author Jenny Colgan grabbed her chance to write a Doctor Who novel, which she called Dark Horizons. She tells children's books site member Patrick about writing a book with 'more violence and less kissing', obeying BBC rules about the Doctor's trousers, and why she called herself JT Colgan Read about Patrick's day at the Edinburgh International Book Festival