Is this the first book (except for the Hobbit and LOTR of course) not edited by Christopher Tolkien? Hopefully it will maintain the high quality of the others.
So “originally” edited by Christopher Tolkien (who is dead), further editing by Brian Sibley.
(I heard it was woke first, over plot/canon, but this could be false.)
And other books have been edited by other people still, see the list here for example: https://www.tolkiensociety.org/author/books-by-tolkien .