The Guardians of Havasu Lake
Book One: A Warrior Must Die
Genre: YA Fantasy Trilogy
After finding a magic stone, Emily learns that it is up to her and her two brothers to keep an evil warrior empress from escaping through a secret portal and invading the earth.
When their plan to fortify the portal is thwarted, they are forced to escape into a world unknown.
Now their only hope is to find the empress and destroy her before the portal reopens.
(In developmental edits.)