I've seen some book on the ICA website and wonder if anyone can recommend whether they are worth buying? Titles include: 'The Many Faces of IC', 'You Don't LOOK sick, Living Well with Invisible Chronic Illness', 'Patient to Patient: Managing Interstitial Cystitis and Overlapping Conditions' and 'A Delicate Balance - Living Successfully with Chronic Illness' or are there any other IC books people would recommend?