Hi there. I tried twice to post the names of the authors of the books, but both times the post got deleted somehow. Anyway Yoga Fibromyalgia was written by Shoosh Lettick Crotzer and Exercises for Fibromyalgia was written by William Smith, M.S. I got them both on Amazon and they were $15 each. Good luck with exercise. I know it helps me to stay limber and in better shape. I take it one day at a time and measure the exercise by how I'm feeling. I try not to push, but I also don't want to give up. Hugs.