The Essential Oils Book by Colleen K. Dodt

The New Age Herbalist by Richard Mabey

Soap & Cosmetic Labeling by Marie Gale

Making Natural Liquid Soaps by Catherine Failor

Making Transparent Soap by Catherine Failor

Milk-Based Soaps by Casey Makela

The Everything Soapmaking Book 2nd Ed by Alicia Grosso

The Soapmaker's Companion by Susan Miller Cavitch

The Candlemaker's Companion by Betty Oppenheimer

The Everything Candlemaking Book by M.J. Abadie