Christopher Tolkien recently edited and released Fall of Gondolin.
What does this new book actually provide? Is there any new content that was not previously published, or is this just a repackaged anthology?
The book includes six different versions of the story:
These are followed by excerpts from the Sketch of the Mythology and Quenta Noldorinwa showing the Tale of Eärendil.
Various excerpts from other works, such as the Valaquenta, The Annals of Valinor, Quenta Silmarillion, Grey Annals, and The Lay of The Flight of the Noldoli from Valinor giving further background of the characters or passages relevant to the story are also included.
Significant versions of the story which aren't included: