Book excerpt: This bestselling guide to the complexities of botulinum toxins has now been extensively revised, updated, and expanded. Now in two volumes, Volume 1 examines clinical adaptations in the toxins in use today, use with other injectables, use for other parts of the body and other indications, and legal aspects, while Volume 2 documents in detail the functional anatomy and injection techniques for the face, neck, and upper chest. No practitioner of aesthetic medicine will want to be without this comprehensive and authoritative guide from the international experts.