The cottage in Mr Hick's garden mysteriously burns down one night, and five children think someone started the fire deliberately. Mr Goon, the local policeman, thinks so too, and isn't at all pleased to have the Five Find-Outers and Dog nosing in on his mystery. 
 
This is the first in the series of Enid Blytons Mystery books featuring the Five Find-Outers and a dog. Text Illustrations by Mary Gernat