Like I noted elsewhere, at least in the US, the government is not allowed to stop a copyright holder from releasing a new edition of a book under the same name.
Rewriting Agatha Christie books has a history<p><a href="https://en.wikipedia.org/wiki/And_Then_There_Were_None" rel="nofollow">https://en.wikipedia.org/wiki/And_Then_There_Were_None</a>