Start with high-confidence aromatherapy books, then narrow by subgenre or adjacent topics.
Wild Beauty
Jana Blankenship
The Essential Oils Apothecary
Eric Zielinski DC, Sabrina Ann Zielinski
Natural Skin Care at Home
Liz McQuerry
The Healing Power of Essential Oils
Eric Zielinski DC, Eric Zielinski
Acupressure With Essential Oils
Merina Ty-Kisera
Natural Homemade Skin Care
Militza Maury