Interchangeable is a Young Adult novel, set in a  small fictional town on the Sunshine Coast in Queensland. 

Like Catriona's other YA novels, it will challenge young adults to discover who they are and stay true to themselves. It will also address some contemporary issues, including the pressure our school system is putting on young people today, and issues around gender transformation. 

It will be slightly different to her other contemporary YA novels, in that it will also fit into the genre, Thriller. 

Catriona hopes Interchangeable will be ready for beta readers to start reading sometime in 2022.