Complex sentence: In 1976, Keene was listed as the co-author of "The Psychic Mafia," an "as told to" book, in which the writing credits were shared with Allen Spragett, a well known Canadian skeptic in the 1970s.
Split into simpler sentences: In 1976, Keene was listed as the co-author of "The Psychic Mafia". This was an "as told to" book, and the writing credits were shared with Allen Spragett, a well known Canadian skeptic in the 1970s.