Who is Eie from Sinuhe the Egyptian: A Novel and what is their importance?

Eie is an acual historical figure. He gains entry to the royal palace by having his wife serve as wet nurse to Crown Prince Amenhotep. When Queen Taia becomes Pharaoh (or regent) after Amenhotep III's death, she elevates the unknown priest Eie to Keeper of the Seal. During the brief reign of "Aton's Kingdom on Earth," Eie handles all administrative matters in Thebes, freeing Akhnaton to deal with his god. He also schemes with Horemheb, the great general, to assassinate the insane monarch and after a brief reign by the boy Tutankhamen, he assumes the throne.