Which modern novel protagonist fell off a cliff to save the female protagonist, was rescued by aliens, went to the United States to develop, and finally returned to the country?

I recommend the book "Reborn American Arms Merchant". The protagonist was rescued by aliens when he fell off a cliff. Then, he was reborn in the United States in 2001 and began his own path as an arms dealer. He relied on his own intelligence and wit to deal with various crises and successfully develop his career. In the end, his two children returned to the country for some reason, triggering a series of new events. I hope you like this fairy's recommendation. Muah ~😗