Four novels in the edgy series about a female contract killer in 1960s London.   Harm In Acapulco, Rina Walker is on assignment. Just another quick, clean kill--until she wakes to find a severed head in her hotel room and a man with an AK-47 charging through the door, in this action-packed series debut that takes us into the traumatic childhood in postwar London that made Rina what she is today . . .   Threat London 1961. Rina is hired by a Soho vice king to investigate the disappearance of girls from his clubs, and discovers they're being supplied to a member of the aristocracy for the gratification of his macabre tastes. Her efforts to save the innocent from slaughter become increasingly perilous as she grapples with layers of depravity, corruption, and betrayal . . .   Malice London 1964. As gang warfare breaks out, Rina struggles to survive amid the battles and betrayals of a gruesome cast of racketeers and gangsters. Her considerable skills as an assassin are her only hope of survival. But it's not just her own life at stake . . .   Stealth London 1967. A working girl is brutally murdered, and when Rina Walker takes out the killer she attracts the attention of a sinister line-up of gangland enforcers with a great deal to prove. But the stakes get even bigger when British intelligence forces her into the deadly arena of the Cold War . . .   Praise for the series:   "The perfect combination of action, mystery and intrigue." --Benjamin Maio Mackay, actor and podcaster