Guardian Children's Books podcast: Simon Mayo on his first book, Itch

Itch is the story oft a 14-year-old schoolboy from Cornwall who is on the run with a rucksack full of chemical elements when he is taken hostage by his crazy science teacher... Radio presenter and former DJ Simon Mayo reads from the book and answers questions from site members, such as - were you a science geek like Itch? How did you find such an unusual name for your character? And what exactly is zenon?