The Pharaoh's Secret by Marissa Moss
Talibah and her little brother, Adom, travel to Egypt so her dad can do work. Talibah expects to go to the pool and have fun each day, but when she hears voices saying "find him!" she realizes that she has a mystery on her hands. Someone has been trying to erase evidence that the female pharaoh, Hatshepsut, existed. Talibah and Adom must help Hatshepsut stay in history, but someone is trying to stop them. Will the Egyptian Pharaoh be erased forever?