Revenge by Lexi Blake is the third and final book in her 
 Lawless 
 series that takes place in the same world as her 
 Masters and Mercenaries 
 series. You do NOT have to have read the connected series to jump right into this series, you do, however, need to read the 
 Lawless 
 series in order. 
 This is the story of Andrew Lawless, the oldest brother and the one who has been the backbone of the family since their parents were murdered. He has become obsessed with catching the murderers to the point of obsession. Seeing his siblings paired off, married and in love, he begins to wonder where his priorities should be and if he should readjust his plan of attack. The investigative reporter that was previously a thorn in his side is now a siren in his ear. He feels for her things he has never felt before - not on such a deep emotional level. But can he who is so closed off even have a chance at making a relationship work? Then there is still the issue of finding the murderer and bringing them to justice while keeping his loved ones safe. 
 The Series: Ruthless, Satisfaction, Revenge.