This book has been described as the herbalist's bible. For the beginner, it's an outstanding introduction to the subject. For those who are already knowledgeable, it is a ready reference and thorough review. To challenge the serious student, it lists questions at the end of each chapter: What family of herbs, useful at other times, should not be used by pregnant women? Mary Carse wrote the book for use in her own classes, over more than 25 years of teaching students. She constantly revised and honed the book, leading up to its publication for the general reader.There are a great many herbals. This one deserves to be on the bookshelf of everybody who has a serious interest in the subject.