(In headcanon sense). Sally Jackson wrote the Percy Jackson series under the pen name 'Rick Riordan'. Because she didn't want to endanger Percy, she had her husband, Paul Blofis, promote the book as Rick Riordan.
I normally try and cut a movie a lot of slack. I try and read books before watching the movies because the books are better. But changing the story line of a book is not cool. BUT I WILL NEVER FORGIVE THESE MOVIES <- Most perfect thing I have ever seen!