I've tagged this one "mystery" but it's really more in the vein of "thriller".
Our heroines are just-retired assassins who were employed by a private organization that was originally founded to hunt down and kill Nazis who had escaped ordinary justice. Now the four sixty-year-old women are reunited for a retirement cruise. We see their glory days as assassins in flashbacks that show them posing as stewardesses, nuns, archeology students and more to carry out elaborate killing plots that rid the world of various drug dealers, crooked bishops, and yes, even elderly Nazis.
In the present day, the women reminisce about their past while commiserating about lost loves, post-retirement life, and the inexorable symptoms of aging -- until one of them notices something that seems wrong, and they are launched into an adventure that requires them to use all of their skills to survive.
This book has a light-hearted tone at odds with the rather brutal murders that are sprinkled liberally across its pages. Because (of course /s) the very idea of a deadly 60 year-old woman is ridiculous.
I could fault the premise, but it seems to form the basis of the entire 'unlikely assassin' genre: it's certainly the rationale behind books like An Elderly Lady is Up to No Good and the entire Mrs Polifax series.
Killers is entertaining despite its many improbabilities and numerous plot holes, and delivers pretty much exactly what you'd expect on every page. 3/5 stars.
