Salaisuus Series by Enid Blyton

Fatty, Larry, Daisy, Pep, Bets and Buster the dog turn detectives when a mysterious fire destroys a thatched cottage in Mr Hick's garden in their village.Calling themselves the 'Five Find-Outers and Dog' they set out to solve the mystery and discover the culprit. The final solution, however, surprises the Five Find-Outers almost as much as it surprises Mr Goon the village policeman.

An adventure for the Five Find-Outers and their dog. Fatty, Larry, Daisy, Pip, Bets and Buster become involved in a very peculiar situation when a series of unsigned letters are sent to various people in Peterswood.

Fatty and the Find-Outers are plunged into an exciting mystery. Who stole the valuable picture from the art gallery? What connects the glamorous Lorenzos with the old Larkins? How does a poodle called Poppet fit into the puzzle? When the truth comes out, Fatty works once more with Inspector Jenks, and solves a mystery that had baffled the nation's police.

Who stole the money that the old man in Holly Lane had so carefully hidden in his cottage and where is it now? Why did his furniture disappear in the middle of the night? Fatty and the other Find-Outers have a long list of suspects, and a few clues, but this latest mystery just won't be solved! Mr Goon, the policeman, is hot on the scent too and he is sure that he has the answer when the others are still utterly confused. But who will solve the mystery first?

Ern is back visiting Mr Goon, which gives him and the Find-Outers the perfect chance to explore Banshee Towers. But there's more secrets to the towers than the screaming banshees. Fatty, Larry, Daisy, Pip, Bets and Buster the Dog have one last case to solve...