The Last Pharaoh

Seattle, 1980.  Billie gets a package containing Nectanebo, the last pharaoh of Egypt, who is out to rule the world again.  To defeat him, Billie needs the help of a cat from Theria, a parallel world she finds at the top of a tree.  In Theria animals live for thousands of years, and share their wisdom with select humans like Billie.  Now it's up to her to figure out how to save her mother's life, and save the rest of the world, from the evil plans of Nectanebo.  Tomb raiding, a nuclear submarine, ancient magic, and the eruption of Mount St. Helens are all part of the action.