The Penguin English Library edition
When Dr John Watson takes rooms in Baker Street with amateur detective
Sherlock Holmes, he has no idea that he is about to enter a shadowy
world of criminality and violence. Accompanying Holmes to an ill-omened
house in south London, Watson is startled to find a dead man whose face
is contorted in a rictus of horror. There is no mark of violence on the
body yet a single word is written on the wall in blood. Dr Watson is as
baffled as the police, but Holmes's brilliant analytical skills soon
uncover a trail of murder, revenge and lost love . . .