Murder With Mirrors is a 1952 detective fiction novel by Agatha Christie. It was first published in the US as They Do It With Mirrors. The book is about Miss Marple, an elderly amateur detective.

Miss Marple is persuaded by her lawyer, Christian Gulbranson, to visit the country mansion of his stepmother, Carrie Louise Serrocold. Carrie Louise's husband, Lewis, has turned the mansion into a halfway house for criminals. Miss Marple senses danger when she visits. Her fears are confirmed when a youth fires a revolver at Lewis, but neither is injured.

Carrie Louise suspects that someone is trying to poison her, so she sends for Miss Marple. Miss Marple must determine who wants Carrie Louise dead.