About the Book: Retired assassins Billie, Helen, Mary Alice, and Natalie are pulled back into action when someone inside their elite organization, the Museum, begins targeting agents connected to a ruthless Eastern European gangster. Tired of watercolor classes and yoga after their time off, the four aging women embark on a globe-spanning mission to root out the mole and take down their most dangerous enemy yet. A riotous, action-packed sequel to Killers of a Certain Age, proving skilled assassins only get sharper with age.