Hey, there are many great recommendations in this thread you can pick anyone. As for close room mystery you can try 'they do it with mirrors', 'hercule Poirot's Christmas', 'the mysterious affair at styles', 'murder on the mews' and so forth. Happy reading.

Thank you.

And yes I have read Sayers she later turned in theological writing but I cannot say I have read all of them but she was probably the best-known and most beloved Golden Age author after Christie. While Agatha may have set the conventions for the plot, Sayers inspired dozens of fictional detectives with her creation, Lord Peter Wimsey. She is equally celebrated for Wimsey's love interest and eventual wife Harriet Vane, introduced in the dock for the murder of her lover in Strong Poison.

The Nine Tailors is my favorite book of hers. Highly recommended.