Killers of a Certain Age by Deanna Raybourn

老妇人经常感到自己被忽视，但有时这就是她们的秘密武器。

她们一生都是一个秘密国际组织中最致命的刺客，但现在她们已经60岁了，四个女性朋友不能就这样退休。在这部充满动作的惊悚片中，要么杀人，要么被杀。

Billie, Mary Alice, Helen以及Natalie为博物馆这个精英刺客网络工作了40年。现在，他们的才能被认为是老派的，没有人欣赏他们。

当四人组被派去参加一个全额支付费用的假期，以纪念他们的退休，他们被自己人盯上了。只有董事会–即博物馆的最高层成员，才能下令终止外勤人员的工作，而她们意识到自己已经被标记为死亡。

现在，为了活着出去，她们不得不与自己的组织作对，依靠经验和彼此来完成工作，她们知道合作是她们生存的秘密。她们要告诉董事会，作为一个女人和一个杀手，在一定年龄段内的真正含义。

Older women often feel invisible, but sometimes that’s their secret weapon.

They’ve spent their lives as the deadliest assassins in a clandestine international organization, but now that they’re sixty years old, four women friends can’t just retire – it’s kill or be killed in this action-packed thriller.

Billie, Mary Alice, Helen, and Natalie have worked for the Museum, an elite network of assassins, for forty years. Now their talents are considered old-school and no one appreciates what they have to offer in an age that relies more on technology than people skills.

When the foursome is sent on an all-expenses paid vacation to mark their retirement, they are targeted by one of their own. Only the Board, the top-level members of the Museum, can order the termination of field agents, and the women realize they’ve been marked for death.

Now to get out alive they have to turn against their own organization, relying on experience and each other to get the job done, knowing that working together is the secret to their survival. They’re about to teach the Board what it really means to be a woman–and a killer–of a certain age.