Complex sentence: Richard wrote "Michael Vey" based off of the fact that he thought that there were too many "dark books" out The book symbolizes courage, hope, loyalty, and a son's love for his mother.
Split into simpler sentences: Richard wrote "Michael Vey" based off of the fact that he thought that there were too many "dark books" out there. He wrote the book to help symbolize courage, hope, loyalty, and a son's love for his mother.