1. Check in physical bookstores (such as Xinhua Bookstore, Zhongshuge, etc.) whether there are genuine comics of "Attack on Titan" for sale.

2. Search for the genuine "Attack on Titan" comics in major online bookstores (such as Dangdang, JD.com, Taobao, etc.) and purchase them.

3. Follow the official social media account or official website of "Attack on Titan" to learn about the latest purchase information.