Ursula was born and grew up in Sydney in a family of writers, and wanted to be a writer from the age of six. She is now the author of over 50 books for children and young adults and her work is published all over the world.

She has won several national literary awards, including the Victorian, Queensland and South Australian State Awards for literature, and has also won the NSW Premier's Literary Award a record five times, more than any other writer in the history of the awards.

Internationally she has been nominated for both the Hans Christian Andersen award and the Astrid Lindgren prize. She has a PhD in English literature and currently lives in Sydney.

Andrew Joyner is an internationally published illustrator and author. His books include The Terrible Plop, written by Ursula Dubosarsky (shortlisted for the CBCA awards and the Prime Minister's Literary Awards), and the Boris series. Boris Gets a Lizard was shortlisted for the Speech Pathology Awards and Ready, Set, Boris was a Notable book in the CBCA Awards.

Recent Boris books include Boris on Show and Slow Down Boris. His picture books include Too Many Elephants in this House (with Ursula Dubosarsky) and How Big is Too Small (with Jane Godwin) and, coming soon, Blue the Builder's Dog (with Jen Storer). He lives in Strathalbyn, South Australia.