Which Tolkien work, published in 2007, presents the story of Túrin Turambar as a standalone book?

The Children of Húrin presents the story of Túrin Turambar as a standalone book and was published in 2007.

Christopher Tolkien edited the volume from his father’s writings, with illustrations by Alan Lee. The book expands one of the major tragic narratives of the First Age: Túrin’s life, his conflict with Morgoth, and the curse placed on the House of Húrin. It was published by HarperCollins in the United Kingdom and Houghton Mifflin in the United States.

The story had appeared in shorter or more fragmentary forms before 2007. Related versions can be found in The Silmarillion, Unfinished Tales, and the long poem The Lay of the Children of Húrin. The standalone edition brought together prose material to create a continuous narrative.

This publication is not a newly written novel by J.R.R. Tolkien. It is an editorial reconstruction based on texts Tolkien produced at different times, which explains why its relationship to other versions matters.