"First published in the Netherlands in 2014 by Uitgeverij Leopold, Wibautstraat"--Title page verso "First published in the United Kingdom in 2016 by Maverick Arts Publishing Ltd."--Title page verso "First published in the United Kingdom in 2017 by Penguin Random House UK." -- Title page verso "First published in Great Britain in 2012 by Hodder & Stoughton"--Title page verso. "First published in Australia in 2017 by Allen & Unwin"--Title page verso "First published in the Netherlands under the title De gele ballon"--page [2 "First published in New Zealand by Scholastic New Zealand, 2019."--Title page verso