According to Wikipedia, the book was originally published by Paolini's parents' company "Paolini International". It was later "discovered by novelist Carl Hiaasen, who brought it to the attention of Alfred A. Knopf. The re-published version was released on August 26, 2003", after "another round of editing".
Is there any information about what edits were made for the Knopf version? How significant were the edits?
The pre-Knopf version are available for second-hand purchase, but for a large sum. Looking at some metadata, the number of pages appears to be less in the original.