Thanks for these Colinp. They were both new to me. I haven't had my focus on Queen Victoria, but have added relatives of her - as they came along. Maybe it is time to focus on her descendants, which mostly are non-British & -Irish Continental European royalty (as far as I know).
Brooke, there was an American woman, Marlene A. Eilers Koenig, who made a lot about Queen Victoria's descendants - two-three decades ago.
If I remember correctly, she was educated a historian and she worked as university liberian.
A little personal experience:
While I studied history at University of Copenhagen (next to my normal job), I wrote Marlene A. Eilers Koenig a question regarding some Danish Royal relation to Queen Victoria.
However, I did not get any good response from her:
I recall her response as being arrogant and rude, informing me, that I didn't know anything about anything - as a student (I was then 33 and a VP). She didn't answer my question, but refered me to her book then, "Queen Victoria's Descendants" from 1997. She soon after updated her book with "Queen Victoria's Descendants: A Companion Edition" in 2004, which can be found here:
Not so long time after, I had corresponded with Marlene A. Eilers Koenig, I visited a close relative, late Peder, Count Bonde of Björnö, whom I had known all of my life, and who was a mentor for me (I worked with finance in their companies in my mid-20s), and whom I called Uncle Peder.
Peder Bonde had for several decades been on the international advisory board at Sadolin & Holmblad, and he was himself a son of a mother from the today still powerful Swedish business dynasty, the Wallenberg family (
www.wallenberg.com), which had controlled a lot Swedish businesses through their Wallenberg foundations and it's holding companies - especially Investor. These companies included among others: Alfa-Laval, Astra and Scania, and they still controlling among others: ABB, Atlas Copco, Electrolux, Saab, SEB Group (banking) and SKF, where he had held senior positions as Chair and Vice Chair of their boards of directors.
Marlene A. Eilers Koenig had meet with Peder Bonde, who found her to be very kind and polite (!!!). She writes a little writes about it here herself:
"Don't judge a book by its cover". However, both the books and their covers are great, and you can might find something in Marlene A. Eilers Koenig's books, which are of good quality and with a lot of details. Also her blog could might be useful for you.