LONDON _ Britain's Court of Appeal has rejected a lawsuit from two authors who claimed "The Da Vinci Code" author Dan Brown stole ideas from their book. The authors had sued Brown's publisher, Random House, claiming Brown copied from their 1982 non-fiction book, "The Holy Blood and the Holy Grail." Both books deal with the theory that Jesus married Mary Magdalene and had a child, and that the bloodline continues. One of the judges said copyright protects an author's labor in researching and writing a book, but does not extend to facts, theories, and themes. Brown was not a defendant in the case. He testified last year that he studied the plaintiffs' book when writing his bestseller but did not copy from it. The authors now face legal bills of about six (m) million dollars.