 Since its publication in 1980, "Hippopotamus on Our roof" has been reprinted annually, evolved into a series of seven picture books and inspired a junior chapter book, classroom play scripts, stage production and a short movie.The Hippopotamus books have also been translated into Chinese, Braille and Auslan signing for the hearing impaired and were presented as an official Australian government gift to the children of Princess Mary of Denmark.Edwards is a National Ambassador for the 2012 Year of Reading and the Premiers' Reading Challenge and other literacy organisations including Dolly Parton Imagination Library.