The Red House Mystery

This is probably one of the top classics of "golden age" detective fiction. Anyone who's read any mystery novels at all will be familiar with the tropes -- an English country house in the first half of the twentieth century, a locked room, a dead body, an amateur sleuth, a helpful sidekick, and all the rest.

It's a clever story, ingenious enough in its way, and an iconic example of Agatha Christie / Dorothy Sayers -type murder mysteries. If you've read more than a few of those kinds of books,...