Detective stories. According to Dangdang. The Mysterious Visitor from the Deep Sea is a popular science book that introduces the deep-sea creatures, and introduces the diversity and uniqueness of the deep-sea creatures in detail, including various peculiar forms, peculiar lifestyles and survival strategies, so the Mysterious Visitor from the Deep Sea is a detective novel. The author of this book published by Zhejiang Children's Publishing House in 2023 is a vegetable garden.