Killers of a Certain Age by Deanna Raybourn

Title: Killers of a Certain Age
Author: Deanna Raybourn
Publication: Penguin, audio, 2022
Narrators: Jane Oppenheimer, Christina Delaine
Genre: Suspense
Setting: Present day

Description: Billie, Mary Alice, Helen, and Natalie have been friends and colleagues since their 20s when they first joined a secret organization called “The Museum” and were trained as assassins.