Andy Griffiths is an internationally successful, award-winning children's author. His books have been bestsellers in his homeland Australia, the USA and the UK. He is the co-creator of the bestselling, award-winning Treehouse series with illustrator Terry Denton, which has been published in over thirty countries. Andy thrives on having an audience: he has worked as a high school teacher; been the lead singer in a rock band and a stand-up comedian. He has two daughters and lives in Melbourne, Australia.

The first book in the Treehouse series, 13-Storey Treehouse, won the Sainsburys Children's Book Award in 2015, the Lancashire Fantastic Book Award in 2016, as well as the 2016 Coventry Inspiration Award, and the fourth Treehouse book, The 52-Storey Treehouse, won the Australian Book Industry Awards Book of the Year prize – the first children's book to ever do so.

Terry Denton is a bestselling and award-winning writer and illustrator based in Melbourne, where he lives by the beach with his wife and three kids. He has won more than fifteen children's choice awards throughout Australia and is the co-creator of the bestselling Treehouse series with author Andy Griffiths, which has been published in over thirty countries. As well as being an illustrator, Terry is a fine artist and has held several exhibitions around inner Melbourne.

The first book in the Treehouse series, 13-Storey Treehouse, won the Sainsburys Children's Book Award in 2015, the Lancashire Fantastic Book Award in 2016, as well as the 2016 Coventry Inspiration Award, and the fourth Treehouse book, The 52-Storey Treehouse, won the Australian Book Industry Awards Book of the Year prize – the first children's book to ever do so.