'Berserk?' repeated Mr Ellis. 'He's stark raving bonkers if you ask me!'
Sigurd the Viking is back, and causing chaos wherever he goes. Even his new wife Mrs Tibblethwaite can't keep him out of trouble. But then, how would you react if you were a tenth-century Viking stuck in the twentieth century?
We asked some of our brilliant authors (and dads): Nick Mohammed, Chris Bradford and Jeremy Strong about the importance of reading with their kids. From creating personal theme tunes to rediscovering Harry Potter, they spilled the beans.