Blood, Deviance and Occultism

A call to arms keyboards has been issued by Side Real Press, a publishing outfit just up the road. They want stories for a collection that is to be:

a tribute to the life, work and themes of Hanns Heinz Ewers. 

Ewers (1888-1943) was one of the major German writers of his day writing novels, poems, plays and screenplays for early cinema, His works are steeped in blood, deviance and occultism.

So, no problem there for most writers of my acquaintance! Actually I've never read anything by this bloke, perhaps because much-vaunted but obscure authors of yesteryear so often turn out to be rather dull. But perhaps Ewers is the exception to this rule. Anybody know his work?