Hello, I read this book and I can say this is the best book on incense in France may even be in europe. Me this book: - Because it speaks resins and simpler plants rarer - Photos we describe the appearance of plants or resins - Photos are also very nice to look at - Recipes that are given are divided from each culture after - The data are authentic recipes - One feels that the author knows the incense - The resins or plants descriptions are carefully - The historical facts in the book are very interesting In conclusion, the book is finally almost complete but the author has the most plants and resins used in the World; the author is necessarily restricted to certain civilizations to the most commonly used resins and plants. What else to say this book is great!