Kane minutely details the delicate task Christopher [Tolkien] undertook in stitching together elements of his father's oeuvre, disparate in genre (from annals and glossaries to full-fledged narratives) and in composition-date (from the 1930s to the 1960s, including work composed both before and after The Lord of the Rings). Kane's textual scholarship is rigorous and is a model not only for Tolkien scholars but for scholars of more canonical authors, whose textual study is often pursued with less enthusiasm. . . . As welcome as the scrupulous registering of minute changes is, the book excels most when it points to [the] larger choices. [An] absorbing study.