The Case of the Feathered Mask

"Maisie Hitchins longs to be a detective. Shes sure there are lots of adventures to be had on the streets of Victorian London. And, together with her faithful puppy, Eddie, she is determined to follow even the slightest scent of a mystery no matter what!"
"Maisie lives with her grandmother and her dog in a boarding house, and longs for adventure and the chance to solve mysteries. When a thief steals Professor Tobin's rare and valuable wooden mask Maisie realises she has a new mystery on her hands."@en
"Junior sleuth Maisie Hitchins, who lives in her grandmother's boarding house in Victorian London, investigates the theft of a rare and valuable tribal mask from the Amazonian rainforest."
"Maisie Hitchins longs to be a detective. She's sure there are lots of adventures to be had on the streets of Victorian London. And, together with her faithful puppy, Eddie, she is determined to follow even the slightest scent of a mystery  no matter what! In book four of the Maisie Hitchins series, Maisie finds herself coming to the aid of her friend Professor Tobin. The professor has travelled all over the world, collecting strange and wonderful objects. Now he plans to donate his collection to the British Museum  including a rare and valuable tribal mask from the Amazonian rainforest. But."@en