Mem is the author of over 25 books and is one of Australia’s best and most loved picture book authors. She is the author of the iconic and bestseller children’s book ever in Australia, Possum Magic which has sold over 3 million copies. Sales of Mem’s books have reached 10 million copies and are sold in many countries around the world

Good Night Sleep Tight is the first time Mem and Judy have collaborated on a picture book since they published, Where is the Green Sheep? This classic Australian title has been in the top children’s book bestseller list since its publication. It has never been published into paperback but continues to sell consistently in hardback and has remained in the top 10 bestselling picture book list for the past 8 years.

Mem has been presented with many awards including an AM in the 1993 Australia Day Honours for services to the cultural life of Australia; an SA Great Award for Literature in 2001; the Prime Minister’s Centenary Medal in 2003; and she was shortlisted for the Australian of the Year in 2004. She has worked as an Associate Professor of Literacy Studies in the School of Education at Flinders University, South Australia for twenty-four years and is now an international literacy consultant.

Judy Horacek is an Australian cartoonist, writer and illustrator. She has been drawing cartoons for about twelve years now and has worked for a multitude of community groups, unions, small magazines and good causes.

Her work is often concerned with feminism, the environment and social justice issues. Six collections of her cartoons have been published: Life on the Edge Unrequited Love, Woman with Altitude, Lost in Space and If the fruit fits. Major retrospective exhibitions of her work have been held at the National Gallery of Victoria, the National Museum of Australia in Canberra. She has also had numerous solo and group exhibitions of her cartoons and her prints.

Her latest books for Penguin include The Story of Growl, These Are My Hands, These Are My Feet and, most recently, Yellow is My Favourite Colour.