This book is great. It gives you a plan to follow to determine what is causing your IBS. It has a questionnaire to help you determine what type of IBS you have. Until I read this book, I did not know that there were different types of IBS. Most books tell you to add more fiber to your diet. This book addresses what to do if more fiber makes your symptoms worse. It recommends linseed (which is flax seed) as a bulking agent that does not ferment in your digestive track. Taking flax seed in juice has greatly helped my symptoms. It also explains how to do an exclusion diet to see if you have food intolerances and what foods to avoid to reduce gas and bloating. All of this is backed up by research at Professor Hunter's clinic in Cambridge, England.