What books about handmade leather goods are suitable for beginners to learn?

The first leather self-study book in leather circle is The Complete Collection of Leather Craft Series. The author is Japanese leather artist Gao Qiao Tokuhiko, and this series is being added one after another. At present, it seems that only Taiwan Province Publishing House is publishing the Chinese version. I wanted to go back to Taiwan Province Province to buy a full set. Later, I found that there are many electronic versions on the Internet, and the people in the leather circle are more enthusiastic. Newcomers suggest starting with 9 volumes 13 and 14, based on these three books.