2010, that's all i can tell.
Christopher Paolini's fourth book is called Inheritance.
November 8th 2011
it will be "inheritance"
it is being released on November 8 2011
"Inheritance" was written by Christopher Paolini. It is the fourth book in the Inheritance Cycle series.
November 8th 2011
Christopher Paolini has announced that he is working on a new book set in the world of "Eragon," but there is no confirmed release date yet for his fourth book. Fans will need to stay tuned for updates from the author.
Christopher Paolini originally made it a trilogy but at the end of book 3 (Brisiner) he says there will be a fourth book.
Book 4 is yet to be named, or a release date for that matter.
The release date for a new Inheritance series book has not been officially announced. Christopher Paolini, the author, has stated that he is working on new projects but has not confirmed a specific release date for another book in the Inheritance series.
The copyright date for "Eragon" by Christopher Paolini is 2002.
If you are talking about the third book, it is "brisingr" and is already out. But if you are talking about the fourth, its name is yet to be announced let alone when.