1) The Lupus Recovery Diet: A Natural Approach to Autoimmune Disease That Really Works (211 pages, 2007) by Jill Harrington. I found an online copy here.
Jill cured herself of lupus by doing a multi-day fast at the TrueNorth Health Center followed by easing into a plant-based diet. TrueNorth Health Center is renowned for conducting supervised fasts. It is located in Santa Rosa, California.
The first half of Jill's book is personal stories and testimonials of various individuals who got cured of lupus by adopting plant-based diets. The recovery protocol and why it works constitutes the latter half. The actual recovery protocol is described in pages 127-150.
Jill Harrington is neither a medical doctor nor a researcher. I felt that her writing lacks scientific rigor. However, the book does a great job of summarizing recovery protocols that have a good chance of working for a lupus patient. These protocols include some combination of three steps in sequence: (a) fasting (water-only fast or juice-fast) for a few days, (b) eating only fruits and vegetables that are known not to cause any inflammation in anybody, (c) introducing families of other foods (grains, beans, other fruits and vegetables) one by one to figure out which of these cause inflammation in specific individuals. Jill also mentions that for some people, switching directly to a plant-based diet (described by doctors like McDougall or Fuhrman; see sections below) without fasting may also work. However, recovery may take longer.
2) Goodbye Lupus: How a Medical Doctor Healed Herself Naturally With Supermarket Foods (95 pages, 2015) by Brooke Goldner.
Brooke cured herself of lupus by adopting a plant-based diet after coming in touch with her future husband (who happened to be a plant-based fitness coach).
3) The Empty Medicine Cabinet: The Pharmacist's Guide to the Hidden Danger of Drugs and the Healing Powers of Food (282 pages, 2014) by Dustin Rudolph. An article from his website which is relevant to autoimmune diseases: Rheumatoid Arthritis - What Is It & How To Treat It. Also see Medical Conditions.
Books by Medical Doctors: The books listed above are by two lupus survivors and a pharmacist. I don't know of any book by a plant-based rheumatologist. However, there are books by general practitioners like John McDougall, Joel Fuhrman and Michael Greger. Collectively, they have treated hundreds of patients with autoimmune diseases over several decades. So I would pay attention to articles / book chapters written by them specifically for lupus or autoimmune diseases. The following books seem promising:
How Not To Die (576 pages, 2015) by Dr Michael Greger.
Super Immunity by Joel Fuhrman (304 pages, 2013).
Fasting and Eating for Health (255 pages, 1998) by Joel Fuhrman.
The Starch Solution (368 pages, 2013) by John McDougall and Mary McDougall.
Other than the doctors mentioned above, three more plant-based doctors are prominent: Dean Ornish, Caldwell Esselstyn and Neal Barnard. However, the focus of their books and talks is heart disease (Ornish and Esselstyn) and diabetes (Barnard).
Overall, the guidelines by all of these doctors (McDougall, Fuhrman, Greger, Ornish, Esselstyn, Barnard) are similar to each other. However, for lupus or autoimmune diseases, some tweaks seem to be necessary. So books by McDougall, Fuhrman and Greger (all of them are general practitioners) are likely to be more helpful.
Resources: (a) Find a Plant-Based Doctor near you, (b) For plant-based diets in general, you may find the articles here helpful.