The Deadly Marmalade Cat

There is something very wrong with Polly’s new friend,
Gemma, a look-alike Queen Nefertiti, and Polly, who is crazy about Egyptian history, is soon worried about her.
What is it about the Egyptian wall-painting that is so scary? And why does Gemma hate it so much?
Why is there a stone Nefertiti in Gemma’s room?
Can either girl escape the aliens and the future mapped out for them?