Mr Majeika and the School Book Week by Humphrey Carpenter

Oh dear,' said Mr Majeika, 'I seem to have made the spell too strong.'Class Three has fun during Book Week, when famous storybook characters suddenly appear! But there's trouble ahead with Wilhemina Worlock the witch at the school's Olympic Sports Day... Will Mr Majeika manage to magic up a solution?
Binding: Paperback / softback