Recommended Reading: 
Earth Medicine and Wisdom

Click here to view our ENERGY AND INTUITION reading list
Click here to view our SELF-DEVELOPMENT reading list
Aromatherapy
Worwood, Valerie Ann
The Complete Book of Essential Oils & Aromatherapy

Crystals
Hall, Judy
  1. The Crystal Bible: A definitive guide to Crystals 
  2. The Crystal Bible Volume 2 (200 additional healing stones) 

Ryan, Karen
The Complete Idiot’s Guide to Crystals (also available as an e-Book) 

Simmons, Robert & Naisha Ahsian
The Book of Stones: Who They Are & What They Teach

Magick - Pagan - Wicca
Cunningham, Scott
  1. Earth Power: Techniques of natural magic
  2. Wicca, A guide for the solitary practitioner

Conway, D. J.
Celtic Magic

Freeman, Mara
Kindling The Celtic Spirit

Mitchell, Mandy
Hedgewitch Book of Days: Spells, Rituals, and Recipes for the Magical Year

Moura, Ann
Grimoire for the Green Witch

Sabin, Thea
Wicca for Beginners
Shamanism  
Cowan, Tom
Shamanism as a Spiritual Practice for Daily Life

Daniels, Jacki 
Heeding the Call: A Personal Journey to the Sacred 

Harner, Michael
The Way of the Shaman

Ingerman, Sandra
I would recommend all of Sandra's book (many of which are also available as audio CDs) but would suggest starting with:
  1. Shamanic Journeying: A Beginner’s Guide  
  2. Soul Retrieval: Mending the Fragmented Self
  3. The Shaman’s Toolkit: Ancient Tools for Shaping the Life and World You Want to Live In

Ingerman, Sandra and Deatsman, Colleen 
The Hollow Bone: A Field Guide to Shamanism

Ingerman, Sandra and Wesselman, Hank  
Awakening to the Spirit World: The Shamanic Path of Direct Revelation

King, Deborah
Be Your Own Shaman

Scott, Gini Graham
The Complete Idiot’s Guide to Shamanism  
(Also available as an e-Book through Chapters/ Amazon)