Well, there have been several music lawsuits about certain songs and their amount of identity to others. If you were to write something as closely to another author that you are imitating something like trademark mannerisms there may be a case for that.
I think that writing in someone else’s style to an extent that it becomes very obvious is indeed something that raises copyright concerns.
No, how would it? You can’t copyright a style.
Well, there have been several music lawsuits about certain songs and their amount of identity to others. If you were to write something as closely to another author that you are imitating something like trademark mannerisms there may be a case for that.
Identity and style are two completely different things, though.
In literature, there are no trademark mannerisms.