Complex sentence: The book was in part based on the largely apocryphal 1979 steam tunnel incident and dovetailed with Patricia Pulling's accusations in the 1980s that D&D and other role-playing games encouraged devil worship and other evils.
Split into simpler sentences: The book was in part based on the largely apocryphal 1979 steam tunnel incident. It seemed to dovetail with Patricia Pulling's accusations in the 1980s that D&D and other role-playing games encouraged devil worship and other evils.