A person wrote a book and had it advertised on amazon as a work of fact. in this book he has told lies about me, naming me. Also, almost 90 percent of the book is built on lies and inmagination. For instance he claimed he was in active service in the marines in KLorea. This is untrue. he states that he started a union and mobsters helped him. this is untrue. the book is full of lies but he has told lies about me. do i have some kind of a case against him? is this on a contingincy basis?