Natural magic utilizes the world around us for magical purposes. Herbs are one of the most important tools for natural magic and the best introduction to this system is found in Scott Cunningham's Magical Herbalism. This book presents a complete system of magic using herbs. You will learn the theory of magic and the tools you'll need. Then you'll get countless techniques for using herbs for magic.
Need a protection method? "Pick several protective herbs and bind the stems together with red thread, then hang them up. This practice dates back to Babylonian times."
You'll find a list of over 115 herbs that details their magical powers, so you can easily find which ones are protective in nature.
How about a divination using herbs? "Get a small quantity of dried patchoulI, mugwort, or wormwood. Crumble the herb between your hands until it is finely diminished. Next, pour it into a small square pan (glass or ceramic). Light yellow candles and place the pan on your working area. Close your eyes, extend the index finger of your weak hand, and gently touch the center of the pan with its tip. Move it at random in the pan, shifting from one direction to another ... Now, remove your finger, open your eyes, and interpret the symbols you have just written in the herb."