Help! I'm fresh out of book. As it turns out, my favorite genre is murder mystery by British writers set in midcentury or earlier. I've read all of Dorothy Sayers, Peter Ellis, Agatha Christie, and G. K. Chesterton (Father Brown). Any suggestions? I also love C. S. Lewis' space trilogy, but maybe that's because it's C. S. Lewis.
edit I prefer a light-hearted tone if possible. If you're thinking, "She likes light-hearted murders? What kind of psychopath is this?," I don't blame you.