Private (Private, 1)

Former Marine pilot Jack Morgan runs Private, a prestigious investigation company. But the world's darkest secrets can only stay private for so long . . .
Private: it's where you go when you need maximum force and maximum discretion. The secrets of the most influential men and women on the planet come to Jack daily-and his staff of investigators uses the world's most advanced forensic tools to make and break their cases.
Jack is already deep into the investigation of a multi-million dollar NFL gambling scandal and the unsolved slayings of 18 schoolgirls when he learns of a horrific murder close to home: his best friend's wife, Jack's former lover, has been killed. It nearly pushes him over the edge. Instead, Jack pushes back and devotes all of Private's resources to tracking down her killer.
But Jack doesn't have to play by the rules. As he closes in on the killer and chooses between revenge and justice, Morgan has to navigate a workplace love affair that threatens to blow the roof off his plans.