Simplify the following text for a Grade 7 native English-speaking person.
Original: Neiderman is arguably best known as the author of The Devil 's Advocate , later adapted into a film of the same name , and the screenwriter who adapted Rain , based on a series of novels released under Andrews ' name .
Simplified: He is the screenwriter of the film based on the `` Rain '' series published as V. C. Andrews ' novels . Six of Neiderman 's own novels have been adapted into films also .