|title= Mariella Mystery Investigates : A Kitty Calamity
|rating=4
|genre= Confident Readers
|summary= When Mariella Mystery (amazing girl detective, aged nine and a bit) and the other Mystery Girls – Violet and Poppy – start to investigate the disappearance of their neighbour’s cat they think it’s going to be an easy case. Aren’t missing cats usually just stuck up a tree or off visiting a house where there’s tastier food? But the girls’ views begin to change when more and more cats start to disappear. Soon everyone in Puddleford is worried. The situation is suddenly serious and it’s up to the Mystery Girls to put an end to the catnapping.