Milady's Skin Care and Cosmetic Ingredients Dictionary
As a reference book, this book is a treasure.  Written for an esthetician by an esthetician, and anyone who works in a salon, spa, or behind the cosmetic counter.  This book not only explains in an easy-to-understand style what the ingredients in a skin care product are, but also tells you what they do, how safe they are, and what side effects they might have. The book also explains what the skin functions are, how products penetrate, and the different skin types and conditions. Whenever a student asks me at a lecture or seminar what books I recommend, the first book that comes to mind is Milady's Skin Care and Cosmetic Ingredients Dictionary, by Natalia Michalun. This book is a must have for all students and estheticians.