Complex sentence: Most of Powers' novels are "secret histories": he uses actual, documented historical events featuring famous people, but shows another view of them in which occult or supernatural factors heavily influence the motivations and actions of the characters.
Split into simpler sentences: Most of Powers' novels are "secret histories". He uses actual, documented historical events featuring famous people, but shows another view of them in which occult or supernatural factors heavily influence the motivations and actions of the characters.