The new 9th edition of Harry's Cosmeticology is available as a three-volume set containing over 2,600 pages of new information on the recent changes in the cosmetic and personal care industry. Chemical Publishing is now offering key parts of the title for those interested in a particular subject area covered in the book with a new line of `Focus Books' for this purpose. Each Focus Book contains a series of selected chapters that can be used as a reference guide for a particular subject area. This book focuses on Part 5: Skin Anti-Aging Theories for Cosmetic Formulation Development. .