The Detective Callum Doyle Series

When NYPD detective Callum Doyle’s partner is murdered, and then his replacement is also brutally killed, suspicion falls on Doyle himself. Then he receives an anonymous message: This is just the beginning. Anyone he gets close to will die - and that includes his family. Desperate to find out who is responsible, but with his every move putting others in danger, Doyle has to ask himself: how low would he sink in order to get his life back?

After a grisly murder in a shabby New York bookstore, Detective Callum Doyle starts receiving sinister phone calls. Doyle is told more deaths are planned but the caller will give him clues, on the condition that he keeps them to himself. As more vicious deaths follow, the pressure on Doyle to find a link becomes unbearable. Does he continue to gamble with people’s lives? Or should he sacrifice everything to defeat a ruthless and manipulative enemy?

In New York a young girl is brutally raped and murdered. Detective Callum Doyle has visited the distraught family. Now he wants justice. Doyle is convinced he knows who the killer is; the problem is he can't prove it. And the more he pushes his prime suspect, the more he learns that the man is capable of pushing back in ways more devious and twisted than Doyle could ever have imagined.