Blackthorn's Botanical Magic, By Amy Blackthorn

Encyclopedia of Magical Herbs, By Scott Cunningham

Grimoire for the Green Witch, By Ann Moura

Incense, By Carl F. Neal

The Northern Shamanic Herbal, By Raven kaldera

Wylundt's Book of Incense, By Steven R. Smith

Crystals for Beginners by Karen Frazier

Cunningham's Encyclopedia of Crystal, Gem & Metal Magic by Scott Cunningham