The triumphant return of Michael Moorcock to Britain's adventuring detective, Sexton Blake, in the crime fiction event of the year!

Michael Moorcock's triumphant return to Britain's adventuring detective, Sexton Blake! His first published novel restored, revised, expanded... and presented with a brand new prequel story!

A deep sea mission...

A baffling murder...

Beneath a sky of limpid sapphire blue, the research ship Gorgon rolls gently on the scintillating waters of the Caribbean Sea.

Below, two men in a bathysphere, lowered more than a 150 fathoms into the crushing depths. But when the sphere is raised, there is only one man inside... and he has a knife in his back!

Now Sexton Blake must answer an impossible question: How did the killer escape