If you've picked up this book, it is most likely because you — or someone you love — has been diagnosed with multiple sclerosis (MS), or perhaps your doctor has mentioned MS as a possibility. Whatever the case, you may have already discovered that putting MS into perspective can be a challenging process. MS is a complex disease, and one that is especially hard to diagnose. Its symptoms vary widely from person to person, and although researchers have made great strides in understanding the condition, the cause remains a mystery.