“Killers of a Certain Age” is a 2020 novel authored by Deanna Raybourn. It is a story of four women who are assassins for a secret organization called the Museum, but find themselves targeted for elimination when they reach the age of sixty. The novel is a thrilling tale that blends action, humor, friendship, and feminism together. It’s an intricately woven plot that keeps the reader engaged throughout the story.