If you don't need a book with preliminary knowledge, buy Seasoning. This book focuses on all kinds of detailed spice knowledge, but it is not closely related to fragrance.
These books can be bought in the market.
There are also many books about Xiangxiang on Taobao. Xiangxiang Store on Taobao admires many fragrant masters in Taiwan Province Province, so most of them sell genuine books in Taiwan Province Province. Personally, I think the difference between books in Taiwan Province Province and books in mainland China is that the original books in Taiwan Province Province are more expensive, both of which are around 150. Second, the book is printed with traditional Chinese characters, and the discourse style is like ancient Chinese. So everyone chooses books according to their own preferences.
If you want to buy books from Taiwan Province Province, start.
For more in-depth knowledge, buy the following.
Finally, I want to talk about my experience in incense. It is not easy to collect this knowledge by books, but it still needs to be obtained through your own practice and communication with people with common sense in this field.