Not out of print. Talking about monsters in the Forbidden City is a book published by People's Posts and Telecommunications Publishing House in 2022 by Chang Yi and painter Tan Nuo. As of August 4, 2022, it can still be searched and purchased on major e-commerce platforms, and it is not out of print. Talking about monsters in the Forbidden City tells an accidental opportunity. Li Xiaoyu found a jewelry earring in the Forbidden City. This magical earring let Li Xiaoyu know about the monsters and animals in the Forbidden City. From then on, Li Xiaoyu began her adventure in five wonderful parallel worlds in the Forbidden City.