A thoughtful and playful story of empathy and kindness now in a standard paperback format for middle-grade readers.Anna Liza likes to help cheer up her mother's psychiatric patients with her 17 top knock-knock jokes and cheerful songs, but when she meets Edward, she hits a brick wall ... A thoughtful and playful story of empathy and kindness from global bestseller Eoin Colfer, particularly suitable for struggling, reluctant and dyslexic readers aged 7+.