One of the secrets of real magic is that it is controlled by the mind. The more things in your ritual to help your mind associate with your goal, the more powerful your ritual may be. Colored candles, scented oils, natural incenses, and more all add to the impact of the magic you wish to do. 
This is a greatly expanded and rewritten version of The Magic of Incenses, Oils and Brews. It includes over 100 new formulas, proportions for each element of the recipes (the most requested feature from his previous book), how to substitute ingredients, and much more. Besides the formulas, it also includes the exact methods of making all of these scented tools, including how to extract the essences from the herbs.