So Many Secrets: Braving the Bunyip Book Four

Desperate to eliminate his enemies, dark lord Borok prepares for the unimaginable. Using germ warfare and raven-like creatures, the evil tyrant launches a nefarious scheme that, once in motion, will result in genocide for the subterranean races. As the plague spreads, so does terror and despair even though agents from strange dimensions bring rays of hope and courage. While renegade sandmen unleash havoc upon the innocent, Nina and Piper witness the tragedy unfolding far beneath their homet...