A MUST HAVE reference book in every home. Well indexed and very readable even by non-medically trained people. This book comes in two print size editions. CAUTION seniors and people with eyesight issues: Do NOT get the smaller print edition unless you have very good eyesight and can read the smaller print size. The editions are identical except for the physical size of the book and the font size, but I find the larger (standard) print size is much easier and much more convenient to read. A LITTLE knowledge can be a dangerous thing, and this book is NOT for you to be-your-own-doctor, but if you read in this book relating to your own specific medical issues and/or concerns you should have a better understanding and should be able to discuss your own health issues more intelligently with your health care providers, i.e be a 'better' patient. The 'simple stuff' you may be able to take care of on your own.