Mara, Daughter of the Nile - by Eloise Jarvis McGraw
Mara is a proud and beautiful slave girl who yearns for freedom. In order to gain it, she finds herself playing the dangerous role of double spy for two arch enemies - each of whom supports a contender for the throne of Egypt.
Against her will, Mara finds herself falling in love with one of her masters, the noble Sheftu, and she starts to believe in his plans of restoring Thutmose III to the throne. But just when Mara is ready to offer Sheftu her help and her heart, her duplicity is discovered, and a battle ensues in which both Mara's life and the fate of Egypt are at stake.