Simplify the following text for a Grade 11 native English-speaking person.
Original: 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. .
Simplified: 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.