Blue, when I'm too sick to read adult books or anything complicated I read children's books I love and have read so many times that I can handle them. I have the Little House books that I can read beginning to end and then restart happily in hardback so it can go IP with me (it's also my first choice usually) and I have the Anne of Green Gables books on my Kindle. They really help me to not get frustrated and still be able to read and distract myself a bit.