Below is the complete list of Deanna Raybourn’s Killers of a Certain Age books in order. For this series, the chronological reading order is the same as the order of publication.
Publication Order of Killers of a Certain Age Books
About Killers of a Certain Age
Deanna Raybourn’s Killers of a Certain Age series is a contemporary thriller sequence about four women who have spent forty years working as professional assassins for a clandestine organization known as the Museum. Billie, Mary Alice, Helen, and Natalie are highly trained, extraordinarily experienced, and approaching an age at which the world increasingly assumes they are harmless or invisible. Raybourn turns that assumption into one of the series’ defining ideas, combining international espionage and violent action with sharp observations about friendship, aging, loyalty, and the usefulness of being underestimated.
Killers of a Certain Age begins as the four women reach sixty and prepare to retire. They joined the Museum as young recruits and became part of an elite assassination program targeting people the organization deemed dangerous enough to eliminate. After decades of missions, they expect their retirement to begin with a celebratory cruise arranged by their employer. Instead, they discover that someone within the Museum has ordered their deaths.
That betrayal transforms retirement into a fight for survival. The women must determine why the organization they served has turned against them while avoiding agents trained by the same institution that trained them. Their advantage is experience. Modern operatives may rely heavily on technology, but Billie and her friends understand surveillance, disguise, improvisation, weapons, human behavior, and the less glamorous practicalities of getting close enough to a target to finish a job.
Raybourn alternates the present-day crisis with episodes from the women’s earlier careers, showing how they were recruited and trained and how their friendship developed across decades of dangerous assignments. Billie receives particular narrative emphasis, but the group works because each woman brings a different temperament and set of skills. Their disagreements feel like those of people who have known one another for most of their adult lives rather than a team assembled simply to move the plot forward.
Kills Well with Others reunites the quartet after more than a year spent largely out of action. Civilian retirement has proved less satisfying than expected, and a summons from the Museum gives them another mission. This time the organization itself appears compromised. Someone inside has assembled information about significant assassinations carried out by Museum agents, and those killings lead toward a powerful Eastern European criminal figure who has begun eliminating people connected to the organization.
The sequel expands the threat internationally while preserving the mixture of present-day action and earlier missions. The women travel through locations including Sardinia, Venice, Montenegro, and Egypt as they search simultaneously for their external enemy and the insider leaking information. Flashbacks reveal younger and less experienced versions of the assassins, allowing the series to contrast who they were at the beginning of their careers with the women they have become.
The Museum provides the larger continuity between the books. It operates according to its own moral logic, authorizing assassinations of people it believes deserve removal, yet Raybourn repeatedly questions what decades of sanctioned killing have cost the people carrying out those orders. Loyalty to the institution is never as dependable as loyalty among the four women themselves.
That friendship ultimately gives the series its identity. Billie, Mary Alice, Helen, and Natalie are formidable because of their professional abilities, but also because forty years together have taught them how to compensate for one another’s weaknesses. Raybourn uses the exaggerated world of international assassins to challenge the cultural tendency to treat older women as irrelevant. In these books, invisibility is not a sign that their usefulness has ended. It is one more weapon they know exactly how to use.