The Sisters of the Crescent Empress: The Waning Moon DuologyThe Sisters of the Crescent Empress is the second book in Leena Likitalo's Waning Moon Duology, a fabulous historical fantasy based on the lives of the Romanov sisters. We all think we know how the story ends With the Crescent Empress dead, a civil war has torn the empire asunder. No one seems able to stop the ruthless Gagargi Prataslav. The five Daughters of the Moon are where he wants them to be, held captive in an isolated house in the far north.