Graphic Novel
Published as Knights of the Old Republic Volume 8: Destroyer.
Check availability & pricing at:

These stories are collected in:

Knights of the Old Republic: Volume 3

and

The Old Republic: Volume 3

Comic Books
Published June thru October 2009 as Knights of the Old Republic #42, 43, 44, 45, 46 by Dark Horse Comics:

Issue #42Issue #43

Issue #44Issue #45

Issue #46

e-Comic Books
Issues #42 thru #46 published 2011
by Dark Horse Digital.

Synopsis:
This book collects together the following comic stories:

• Masks
  When an argument between ex-Padawan Zayne Carrick and the mysterious Jarael leaves her questioning her place in his life, the appearance of the Jedi Malak threatens to make up her mind for good. Yet Malak's not the only one with an interest in Jarael. Just how far the Mandalorian Rohlan is willing to go to stay by her side has never been revealed -- until now!
  Former Padawan Zayne Carrick's new life takes a turn for the worse as a con gone wrong puts his friends in a deadly predicament! Fleecing the corrupt financial exchange on Metellos 3 seemed like a victimless crime to Zayne's friends Jarael and Rohlan -- until they became the victims! Now prisoners of a galactic criminal syndicate, Jarael and Rohlan must find a way to survive long enough for Zayne and his conniving cohort Gryph to rescue them!

• The Reaping
  When Zayne and crew infiltrate a comet mine, his partner Gryph believes it's another clever con to capture some quick cash. Little does Gryph know, Zayne and Jarael have other intentions: like rescuing the miners enslaved by this ruthless mining operation. Of course, the noble intentions of the team will all be for naught if their plot is discovered. Swimming through stardust is no place to be when enemy ships open fire!
  The latest masquerade of the Hot Prospect and its crew has been discovered!
  Up against the Crucible, a massive slave-trading organization, Zayne Carrick is having another streak of unfortunate luck. Zayne and Jarael entered a comet-mining facility with the intention of freeing its slaves and taking a knife to the miners' profits, but when the Crucible is tipped off that imposters are nudging in on their territory, a death-defying space battle ensues!

• Destroyer
  Despite a disastrous first encounter with the Crucible, Zayne Carrick is still determined to end the brutality they promote in their business. But this time, he plans to break them from the inside out!
  Having set himself up to be captured by the slavers, when this former Padawan arrives at the Crucible's training facility, it will be all he can do to survive, let alone focus on learning about their organization. His connection to the Force will give him an unexpected insight: one that he doesn't necessarily want. And when a past nemesis of his friend Jarael appears, Zayne begins to worry that entering the Crucible may be the biggest mistake of his life!
  A captive of the Crucible slaver organization, Zayne Carrick is finding there is much more to his friend Jarael's past than she revealed. Specifically, a Crucible trainer called Chantique is looking to settle a score, and she believes that Zayne could be key in that objective. Her plan will have him desperately attempting to resolve the psychic attack that she, the Crucible, and fellow slaves have waged in his mind -- all while he fights for his life!