Deidre Dawson, reviewing The Evolution of Tolkien's Mythology in Tolkien Studies, noted that it was one of the first books on Christopher Tolkien's 12-volume work, barring studies such as those by Verlyn Flieger and Tom Shippey. She finds the analysis of theology and comparative mythology "quite dense", showing an "impressive" command of both the legendarium and Tolkien's ancient sources, and finds "convincing" the argument for the growing importance of "Judeo-Christian theology" in Tolkien's writings. She disagrees, however, with Whittingham's claim that his struggles with the legendarium's original flat world cosmology showed that "his mythology was not relevant to people of a modern, scientific age". On the contrary, Dawson writes, if he had failed to make his mythology relevant, there would neither be so many readers of his work, nor such a variety of researchers studying it.[8]
B. N. Wolfe, reviewing the book for the Oxford C. S. Lewis Society, writes that it does much that should assist other scholars, and is "serious scholarship in a field full of insubstantial popularizations."[4] Wolfe is relieved that while Whittingham acknowledges her debt to Flieger, she does not agree with Flieger's view that "most of Tolkien's ideas" came from Owen Barfield. All the same, Wolfe suggests that Barfield should have been discussed. He finds interesting her analysis of Christopher Tolkien's elimination of all forms of framing of The Silmarillion as he published it. Overall, he recommends the book, forgiving its "many" faults since "it is blazing a relatively new path".[4]
David Bratman, in Mythlore, writes that the book is a "good start" on scholarship about the history of Tolkien's writing, which like Tolkien's legendarium itself "takes time to absorb". He notes that it is among the first book-scale studies of The History of Middle-earth, following Flieger's work on the time-travel aspects and its frame structure. In his view, however, the book is more like Christina Scull's essay in the 2000 collection Tolkien's Legendarium. He writes that Whittingham's chapters look at the "serious" topics that Tolkien addresses, in an order which is both logical and in the same order as in The Silmarillion.[9]
David Bratman's analysis of Whittingham's chapter themes, matched to The Silmarillion[9]
^ abcWolfe, B. N. (2010). "[Review:] The Evolution of Tolkien's Mythology: A Study of the History of Middle-earth. Critical Explorations in Science Fiction and Fantasy". The Chronicle of the Oxford University C.S. Lewis Society. 7 (1): 37–41. JSTOR48617981.
^Lee 2022, "Unfinished Tales and The History of Middle-earth: A Lifetime of Imagination".
Whittingham, Elizabeth A. (2019). "'A Matter of Song': The Power of Music and Song in Tolkien's Legendarium". In Julian Eilmann; Friedhelm Schneidewind (eds.). Music in Tolkien's Work and Beyond. Walking Tree Publishers. pp. 135–158.