Which Tolkien work was published posthumously in 2007 as a complete standalone story?

The Children of Húrin was published posthumously in 2007 as a complete standalone story. Christopher Tolkien edited the book from J.R.R. Tolkien’s writings and presented it as a sustained narrative of the First Age.

The story follows Túrin Turambar, whose life is shaped by the curse placed on his father, Húrin, by the Dark Lord Morgoth. It is one of the tragic narratives connected with the wars of Beleriand and the wider mythology later represented in The Silmarillion.

Tolkien wrote and revised versions of the story across many years, and portions appeared in earlier posthumous collections. The 2007 volume brought together the most complete continuous form available, with illustrations by Alan Lee.

It is sometimes confused with The Fall of Gondolin or Beren and Lúthien, which were also published as edited posthumous books. Those works concern different major First Age legends, whereas The Children of Húrin centers on Túrin and his family.