The Ravyn's Revenge - Edgeworld Chronicles, #3

Vigilante. Murderer. Hero. Kittryk Ravyndaar has searched for his brother for over five long years. Each scrap of information, from Pietro's patient identifier to Kasseus Minshaar's experience, brings him one step closer to victory. Now, all he needs is someone with enough skill to break into a secure research facility and obtain his brother's last known location. What he needs is Cpl. Ricardo Jackson. Broken legionnaire.
Dishonored Misfit. Haunted by his actions during interrogation and believing his NCO dead, Jackson avoids his squad mates and drowns his past in the bottom of the bottle. Until a dead man asks him for a favor and gives him one last chance at redemption. Now the Ravyn and Ricardo must evade the Alliance, uncover an unknown enemy working against them, and race against time to rescue the pirate's lost brother.
As a larger plot unravels and new enemies appear, they don't have time to succumb to temptation. But not even the Ravyn can evade love.