The Book of Crystal Healing by Liz Simpson, published in 1997, is a practical guide to using crystals for healing and personal growth. It explores the metaphysical properties of various crystals and gemstones, offering advice on how to select, cleanse, and use them for physical, emotional, and spiritual well-being. The book includes techniques like crystal layouts, meditation practices, and a reference guide to the healing properties of different stones, making it a valuable resource for both beginners and experienced users of crystal healing.