Patterson Ben Patterson 
Echoes of Eternity [EPUB ebook] 

In Echoes of Eternity, identical twin sisters Amara and Lyra, born years apart, escape captors bent on stealing their people’s most guarded secret believed to be the gift of immortality. Their world’s survival rests on the twins’ bond and cunning as they fight to keep their legacy safe. As they flee across an alien landscape, they face an unending chase to protect their people’s last hope, a secret if shared could destroy everything-even if it means they have to keep running forever.