Tim Clare 
The Ice House [EPUB ebook] 

War doesn »t end. It sleeps.Delphine Venner remembers everything. She remembers what it is to be a child of war, and what the terrifying creatures from another world took from her all those years ago.And in that other world, Avalonia, someone waits for Delphine. Hagar, a centuries-old assassin, daily paying a terrible price for her unending youth, is planning one final death, the death that will cost her everything. The death which requires Delphine.In the battle to destroy an ageless evil, Delphine must remember who she is and be ready to fight once more, as war reawakens.