Carol Schiller is the co-author of seven internationally published books on the use of essential oils and cofounder of the International Aromatherapy and Herb Association. She has spent over twenty-five years studying and researching the benefits of plant oils, and determining their practical uses and applications. Along with David Schiller, Carol has been instructing classes and training workshops for companies, ... Read morecolleges and other educational organizations since 1989. She has also been a featured presenter at international conferences. David Schiller is the co-author of seven internationally published books on the use of essential oils. He has spent over twenty-five years studying and researching the benefits of plant oils, and determining their practical uses and applications. Along with Carol Schiller, David has been instructing classes and training workshops for companies, colleges and other educational organizations since 1989. Jeffrey Schiller, the illustrator of the book, is cofounder and president of the International Aromatherapy and Herb Association (IAHA), and publisher/editor/photographer of Making Scents magazine. Jeffrey instructs classes on aromatherapy, photography, and organic gardening for colleges and other educational organizations. Show Less