Mr Dan Metcalf 
The Curse of the Cairo Cat A Lottie Lipton Adventure [PDF ebook] 

Welcome to the British Museum, home to Lottie Lipton: nine-year-old investigator extraordinaire!
Lottie loves living in the museum with Great Uncle Bert but, when the Golden Cat of Cairo disappears at the launch of a new exhibition, Lottie”s home is under threat. Can Lottie, Great Uncle Bert and Reg the caretaker follow the clues and find the ancient Egyptian cat in time, or will Lottie lose her home forever?
Perfect for developing and newly confident middle grade readers,
Lottie Lipton Adventures are packed with action, and puzzles for the reader to solve. With a courageous heroine (with a hint of Indiana Jones about her), children will love these historical adventures.