Rick Riordan is the author. He made up the series his son,
The author for that series is Rick Riordan
The lightning thief was Ares, and he was not in chapter 12. Percy does have dreams about Hades though implying that he thinks Percy is the lightning thief.
Rick Riordan wrote the whole Percy Jackson series, including the Lightning Thief.
No, there is not an Emma in the Lightning Thief. There is not an Emma is the Percy Jackson movie, the Lightning Thief either. A demigod named Emma is not ever mentioned in the Percy Jackson series.
Luke Castellan stole the lightning bolt
Luke was... He hid it in the shield he gave Percy....
Zeus believed that Percy stole his lightning bolt.
Percy Jackson is the main character in 'Percy Jackson And The Lightning Thief' if that's what you meant.
Rick Riordan
Percy retrieved the lightning bolt that had been stolen from Zeus.
In The Lightning Thief, Percy is being communicated with in his dreams by his father, Poseidon, the Greek god of the sea. Poseidon uses Percy's dreams to provide guidance and messages to help him on his journey.
If you are asking Who is the author of The Lightning Thief, then the answer is Rick Riordan. This is the first book in the Percy Jackson and the Olympians series. There are five and the author to all of them is Rick Riordan.