xiv Introduction I hope that this book will illuminate the topic of acne for those who are interested. Some may have acne themselves and be searching for knowl- edge regarding the topic. Others might have an interest in medicine and caring for others. Still others may be interested in knowledge for knowl- edge’s sake. Whatever your reason for reading, I believe that you will find this book an appropriate and informative guide, and I hope that you enjoy reading it as much as I enjoyed the experience of writing it.