This is a fantastic and interesting book. It simplifies the meaning and usage for so many crystals. It also gives you how they can used and what crystals go good together to heal different things and project positive energy. I originally bought this for my teenage granddaughter but I'm having to order another one for her so I can keep this one and get some crystals for myself. I highly recommend this book if you're just starting to work with crystals. This author explains things so it's so easy to understand.