The Children of Húrin is one of the many works of J.R.R. Tolkien to be published posthumously. It details the life of Túrin Turambar, as well as his father, mother, and sister, including the sack of Nargothrond and the defeat of Glaurung. Which, in essence, means that it is about 320 pages of both Húrin and Túrin whining about how much their lives suck. To be fair, they do suck, but that doesn't mean that they have to whine that much about it.