Amy recommends "Killers of a Certain Age"

 

Four sixty-something women are retiring – from their jobs as assassins for a clandestine international organization known as The Museum. After decades of service they discover they are the newest marks. This book manages to be funny, gruesome, and a loving nod to longstanding female friendships. The publisher describes it as a cross between the Golden Girls and James Bond. That description is spot on. This book is intended for adults.