Length 26 cm, width 18.5 cm. According to Dangdang.com, Autumn of the Mermaid is a book published by Hunan Literature and Art Publishing House in 2022, with a length of 26 cm and a width of 18.5 cm. The Fall of Mermaid is a long science fiction novel, which tells the story of Bai Chunian and Rambo's international rescue team cooperating to rescue Rambo, an old acquaintance of the mermaid clan leader.