Christopher James Paolini (born November 17, 1983, Los Angeles, California) is an American author. He is the author of the "Inheritance Cycle", which consists of the books "Eragon", "Eldest", "Brisingr" and "Inheritance". He currently lives in Paradise Valley, Montana, where he wrote his first book.
Christopher first book was Eragon. 
We don't know if that wad his first book. It could have been, but we are not sure it is. 