Sacha Cotter is a writer, librarian and teacher. Sacha and Josh have previously collaborated on three picture books: Keys/Ngā Kī, The Marble Maker/Te Kaihanga Māpere and The Bomb/Te Pohū. The Bomb was the Margaret Mahy Book of the Year – Supreme Winner, won the Picture Book Award and was a finalist in the Russell Clark Award for Illustration in the New Zealand Book Awards for Children and Young Adults 2019. It also won the Storylines Notable Book Award – Picture Book Category in the same year and was selected as one of the New Zealand Listener 50 Best Books for Kids. Keys was a finalist in the picture book category and Ngā Kī was winner of the Māori Language Award of the New Zealand Book Awards for Children and Young Adults 2015. Ngā Kī also won Te Tohu Taurapa Award in the LIANZA Children’s Book Awards 2015 and was selected for the IBBY Honour List in 2016. Te Kaihanga Māpere won Te Kura Pounamu award of the New Zealand Book Awards for Children and Young Adults 2017.