The first 50 episodes of the cult radio drama series GHOST HUNTER JOHN SINCLAIR in a classic-design collector's box on 8 MP3 CDs. Perfect for collectors, hunters, and those who aspire to be. Biography (Jason Dark): Helmut Rellergerd, born in 1945, has been writing the cult series JOHN SINCLAIR under the pseudonym Jason Dark since the late 1970s. JOHN SINCLAIR is one of the most successful horror series in the world, and Helmut Rellergerd is one of the most widely read German-language authors.