Part of the problem with this book is the cover. It's embarassing to walk around with a book called Spontaneous Healing with a huge picture of a bearded man on the cover. You automatically look like you would smell like patchouli. However, the book is quite serious and, for being on the best-seller list, is pleasantly devoid of fru-fru bullshit so common to books on natural healing and health.
The book is written by Dr Andrew Weil - a Harvard-educated doctor who is interested in natural health and alternative medicine. The overall premis of the book: your body has the potential to heal itself. Try to plug into that.