After forty years of hunting Nazis and killing bad guys, Billie, Natalie, Mary Alice, and Helen are ready to trade in their guns and poisons for pensions and vacations.

But when they set sail on a retirement cruise, an agent from their shadowy vigilante organization tries to set off a bomb on the ship. The betrayal stings: why would their bosses write a contract for their lives? And why would they think one man alone could finish the job?

Killers of a Certain Age reads like an angrier, bloodier, cat-and-mouse version of The Thursday Murder Club. Think James Bond action with Veronica Speedwell banter, and let’s hope there’s a sequel.