Catherine Greer, BA Hons, MA, is an author of fiction and non-fiction, a copywriter and an age positive advocate at the lifestyle blog LoveOurAge.com. Catherine’s books include The 10 Minute Fix (2020), Love Lie Repeat (2019), and the award-winning Choosing Happiness (2006), in collaboration with Dr. S Dowrick. Catherine lives with her husband and two young adult sons in Sydney. Violin and Cello is her second collaboration with musician and co-author, Alexander Lau. The two first worked together on Catherine’s growth mindset picture book, Jacaranda Snow (2018).

Alexander Lau is an emerging contemporary classical composer. He studied composition for six years under Dr Nicholas Vines. Having played violin for 15 years, Alex often writes chamber music for strings. He is also a member of the Seraphim String Trio, established in 2015. Alex's compositional style is diverse and often changes. Most recently, his works have been influenced by Jazz and American minimalism. Alex is also the composer of ‘Jacaranda Snow’, a piano quartet for the growth mindset picture book, Jacaranda Snow. Alex lives with his family in Sydney and currently studies at The University of NSW.

Joanna Bartel is a designer and illustrator. Previously, she has been a graphic designer for a boutique fashion label, a senior art and design teacher and an English teacher in Melbourne and Brisbane, and a copywriter and graphic designer in marketing. Now she brings her experience in Arts education, design, teaching and creative marketing to her illustration work! Joanna particularly loves character design and creating imaginative and playful images to engage children and enhance imaginative learning. While growing up, Joanna loved books, reading to her younger brothers, and writing and illustrating her own stories. Art, Design and English were always her favourite subjects at school and these interests guided her university studies and pursuit of varied roles in the creative industries. Joanna moved to Brisbane with her husband for his work in 2013 and, since becoming a mother to two small children, is now balancing family life with her other great loves of drawing and writing.