Yes, that book is now my top recommendation for anyone in treatment because she has solid practical advice for some of the various types of cancer, if need liquid options, extra nutrition, etc. And it is readable! I haven’t met Miriam but have corresponded with her...my review of her book is on Amazon. She has a good website, media has a recent TED talk, food list. https://www.dietarytherapies.com/foods/
I have a document on the Ketogenic Diet for Cancer geared to patients in standard of care treatment, hundreds of resources and articles that should be understandable to average person with in interest in nutrition, backed by studies. Happy to share it with anyone, PM me an email address.
For more of the science, but still readable, yet not a biochem textbook like Dr Seyfried's, Tripping over the Truth by Travis Christoferson. It is a good "in between" level book.

Jean, your granddaughter had cutting edge treatments, supported and surrounded by her loving family and school. She looks so healthy and happy...Wishing her the best summer ever.