Alright, here are a few recommendations for mystery novels: Sherlock Holmes: This is a classic detective novel by Conan Doyle, which tells the story of Holmes and Watson working together to solve various mysterious cases. 2. The Mysterious Island: This is a suspense novel by Quinn of the United States. It tells the story of a group of strangers who are trapped on a deserted island and can only find a way out through reasoning. 3. The Three-Body Problem: This is a Chinese science fiction novel. Although it is not a pure secret room mystery novel, it contains many secret room escape plots, so it is very suitable for readers who want to read such novels. Shutter Island: This is an American story about a doctor who discovers some unusual phenomena on Shutter Island and needs to solve these mysteries through reasoning. The Silence of the Lambs: This is a horror novel by Lee Howton, an American author. It tells the story of a psychological game between an FBI agent and a mentally ill person. It is a classic secret room mystery novel. I hope these recommendations can satisfy your reading needs!