Thalia Kalkipsakis is the author of several books in the Go Girl! series, including The Worst Gymnast, Sister Spirit, and Basketball Blues. She has also written a nonfiction book, It’s True! Sleep Makes You Smarter! Her books have been translated in many languages and sold around the world. Kalkipsakis grew up on a farm on the outskirts of Melbourne, Australia, and used to escape into the bush to explore. Her biggest passion has always been writing, but she has also been a dancer and edited websites and travel guides. She now lives in north-eastern Victoria with her husband and two children and a black cat named Bindi.
Ruby Rees-Wemyss has been a passionate book lover and teller of tales since a young age. She completed a three-year acting course at Limelight Drama School with Red Stitch Actress and drama teacher Olivia Connolly. Ruby is an avid voiceover artist, with audio credits to her name such as Honda, Alcoholics Anonymous and World Vision. She has played multiple screen rolls for both student and professional productions.