Other LaVey associates from this time period include noted Science Fiction and Horror writers Anthony Boucher , August Derleth , Robert Barbour Johnson , Reginald Bretnor , Emil Petaja , Stuart Palmer , Clark Ashton Smith , Forrest J. Ackerman , and Fritz Leiber Jr. According to the Church of Satan historiography , other LaVey associates from this time include noted Science Fiction and Horror writers Anthony Boucher , August Derleth , Robert Barbour Johnson , Reginald Bretnor , Emil Petaja , Stuart Palmer , Clark Ashton Smith , Forrest J. Ackerman , and Fritz Leiber Jr. .