The wave and the cave
A very thoughtful review:
https://paulwindsor.blogspot.com/2020/03/the-wave-and-cave.html#more
It recommends the book to empower three groups of readers
(a) those who know nothing about these illnesses and want to learn, from the very beginning;
(b) those who know people battling with them and want to get to the other side of their own fears/anxieties and become a valued friend;
(c) those for whom the wave is building… and “the encouragement of a story from someone up ahead of them along the same way.”