'George Feather should have known the first rule of chimney sweeping: don't fall in. Especially in Little Obscurity, a city of clockwork creatures and steam-powered villains, because who knows where you'll end up?
'Now George has uncovered a trio of eccentric codebreakers calling themselves the Bureau of Mysteries, and they've requested the young chimney sweep's assistance to stop their rivals, the Clockwork Octopus Society.
'Together with the less-than-helpful Imp Spektor, George must battle sea monsters, ghosts and dragons while breaking some fiendishly hard codes.' (From the author's website.)