Katja Alves was born in Coimbra, Portugal, and grew up in Switzerland. She has had many different jobs, including bookseller, journalist, and editor of radio broadcasts and books. Her primary focus these days is writing novels and radio plays for children. She lives in Zurich with her family.

Taltal Levi was born in the Galilee, Israel. She graduated from Lucerne University of Arts and Design with a degree in illustration fiction and has worked as a freelance illustrator since. In 2019 she was nominated for the Serafina Young Talent Award with her picture book debut A Little Courage. Taltal Levi works and lives in Basel, Switzerland.