Mariella Mystery (That's me!) - totally amazing girl detective, aged 9 and a bit. Able to solve the most mysterious mysteries and perplexing problems, even before breakfast. When their teacher Miss Crumble spots the ghost of her pet guinea pig, Mr Darcy, in her back garden, she doesn't know what to think. But Mariella knows it's up to her and her fellow Mystery Girls to get to the bottom of The Case of the Ghostly Guinea Pig.

Mariella Mystery (That's me!) - totally amazing girl detective, aged 9 and a bit. Able to solve the most mysterious mysteries and perplexing problems, even before breakfast. Someone is trying to sabotage the Great Puddleford Bake-Off, 'Bake or Break'. It's up to Mariella and her Mystery Girls to work out who, to save the Victoria sponges and pavlovas and prevent the entire contest from turning into a veritable Cupcake Catastrophe and Kitchen Nightmare.

Mariella Mystery (That's me!) - totally amazing girl detective, aged 9 and a bit. Able to solve the most mysterious mysteries and perplexing problems, even before breakfast. The citizens of Puddleford are being terrorised by a strange fog. People caught up in the fog experience such unnerving hair problems as extreme frizziness, wild, uncontrollable volume and shocking colour transformations for days afterwards. Just what is going on? It's up to the Mystery Girls to find out - before the huge hair scare gets even bigger...

She's smart as a whip, super sleuth-y, and able to solve most mysterious mysteries and perplexing problems in no time flat. Mariella Mystery (age nine and a bit) knows that all good detectives write down important information about their investigations. In this top-secret journal she tackles the case of the cursed poodle with important clues and observations, helpful drawings, and handy tips for new detectives. Early readers will be hooked on this mystery chapter book from page one!

Everyone's favorite super sleuth, age 9 and a bit, is back to solve another mysterious mystery. In The Spaghetti Yeti, Mariella is there really a spaghetti-loving yeti stalking the woods next to Limpet Rocks Campsite? Mariella and the Mystery Girls are determined to find out. Kids will enjoy going along with Mariella as she searches for clues and writes them down in her top-secret journals. Diary of a Wimpy Kid fans will be captivated by this charming detective—and they won't want to miss any of her riveting escapades.