Books about Chronic Illness, Invisible Disability

I’m looking for books which either focus on or have a realistic depiction of disability; specifically, chronic conditions and invisible disabilities. 

I live with Crohn’s Disease and an ileostomy, and I’ve been working myself up to write a book about my experiences for several years now. I haven’t read many books which depict the kinds of things I want to write about. That’s not for a lack of trying, chronic illness is underrepresented in literature and art in general. 

The closest I’ve come is: 
A Little Life – Hanya Yanagihara (Jude St. Francis)
First Law Trilogy – Joe Abercrombie (Glokta)
The Choice – Dr. Edith Eger

Of course, the first two are rather extreme instances of disability, and are fiction.
The Choice isn’t really disability, but its meditations on recovery I found hugely inspirational and informative for how I’d like to write about learning to cope with illness.

Therefore, I’m open to fiction and non-fiction, though primarily I’d like non-fiction recommendations, as I mainly want books which will help inform my approach to writing my firsthand experiences.

Thanks for taking the time to read, any and all recommendations are appreciated 🙂