Simplify the following text for a Grade 10 native English-speaking person.
Original: After his arrival in the United States , he wrote a novel about convict life called Moondyne : An Australian Tale , whose central character was called Moondyne Joe .
Simplified: After he got to the United States , he wrote a novel about convict life called Moondyne : An Australian Tale , whose main character was called Moondyne Joe .