Billie, Mary Alice, Natalie and Helen are the best of the best - covert assassins for a shadowy organisation called The Museum.

Only now the quartet have all turned 60, and are facing retirement. 

They go on a celebratory cruise, organised by the Museum.

However, soon the women uncover a plot to assassinate them. 

They escape, and then have to figure out why they're being targeted.

Each of the women know that the easiest way to find out what's happening is to play to their greatest strength. The fact that as women age, they become more and more invisible.

And underestimated.

Killers of a Certain Age is the type of book I wish there was more of. Middle-aged to pushing the retirement envelope ladies kicking ass and taking names. Books. Movies. TV shows. Give me all of it.

Anyway.

I did enjoy Killers of a Certain Age, but I did find the flashback chapters tended to slow down the action of the main story just a bit.

Minor criticism aside, this was great fun to read.