So, in addition to the new book out on Edith Tolkien, there's another book just out that includes a chapter on Mrs. T.
THANKS FOR TYPING: REMEMBERING FORGOTTEN WOMEN IN HISTORY, cmp Juliana Dresvina.
From the description given on the publisher's website, the book as a whole reminds me of Johanna Russ's HOW TO SUPPRESS WOMEN'S WRITING (unfortunately).
For those who might be interested in the book and to give an idea of the range here, I've copied the Table of Contents below. Of these, of course it's Chapter 16, Edith Tolkien in the Eye of the Beholder, by