Moon Princess by Barbara Laban (author)

Sienna is unhappy. Her mum has disappeared and Sienna feels alone in Shanghai. Rufus – an invisible dog – is her only friend. When their mean housekeeper starts acting suspiciously, she decides to investigate. She follows a trail of clues that leads her to a mysterious moon-lit temple. Is her mother’s disappearance linked to a priceless statue of the moon princess? And can Sienna discover the dangerous truth?