(Paperback)

When the sudden collapse of the Victoria Embankment uncovers a passage to an unknown realm, Langdon St Ives sets out explore it, not knowing that a wealthy psychopath is working to keep the underworld's secrets hidden for reasons of his own.

(Paperback)

It is the late 19th century and a mysterious airship orbits through the foggy skies. Its terrible secrets are sought by many, including the Royal Society, a fraudulent evangelist, a fiendish vivisectionist, an evil millionaire and an assorted group led by the scientist and explorer Professor Langdon St Ives.