Other great books
You dont look sick is definitely a great book! Another one that I have found is called Sick and Tired of Feeling Sick and Tired(excellent book). Additionally, here are some others that are superb for people with Invisible Chronic Illnesses.
We are not alone: Learning to Live with Chronic Illness (excellent)
A delicate balance, living successfully with chronic illness
I initiially got all these at the libraty and when I saw how great they were, I purchased them on Amazon. Got some used ones at good prices and even bought the You dont look sick, and sick and tired of feeling sick and tired for a friend of mine with Lyme disease. She agreed that it was so helpful for her