This story is collected in:

X-Wing Rogue Squadron Omnibus: Volume 2

• Issues 17, 18, 19 & 20:
  Malrev 4 is an uncivilized planet in a pretty, but otherwise useless, corner of the galaxy. Inhabited by vicious, unthinking brutes, it's like a living museum of pre-evolution. You wouldn't bother going there unless you had a death wish, or you were a member of Rogue Squadron and you were trying to rescue a downed cruise liner.
  It should have been a simple mission for the men and women of Rogue Squadron, an easy search-and-rescue for a group of Bothan castaways forced down on Malrev 4. But when they got to the backwater planet, the Rogues found themselves first attacked by the Irrukiine, a doglike aboriginal race, and then by the Bothans themselves. There's some strange kind of hoodoo going down on Malrev 4, this planet promotes madness and deceit, and not even the Rogues are immune!
  The Bothan tourists that Wedge and crew have come to save are neither Bothans nor tourists, they're a consortium of spies assigned to follow the Emperor. Wedge is glad to know this now, but he'd have been happier to have discovered this fact before his crew were trapped on this back-water planet called Malrev 4. Now Rogue Squadron is in the middle of a firing ground, between a twisted, self-styled "Lord of the Sith" who calls Malrev 4 his home and the leader of the spies, Girov, who desires the planet, its great temple, and all its power for his own!

Synopsis taken from Dark Horse Comics, www.darkhorse.com.

Related Stories (in chronological order):

• Rogue Squadron 1/2 by Michael A. Stackpole et al.
• A New Hope
• The Empire Strikes Back
• Return of the Jedi
• The Truce at Bakura
• Lucky by Rob Williams et al.
• Rogue Leader by Haden Blackman et al.
• Rogue Squadron Special by Ryder Wyndham et al.
• The Rebel Opposition by Michael A. Stackpole et al.
• The Phantom Affair by Michael A. Stackpole et al.
• Battleground Tatooine by Michael A. Stackpole et al.
• The Warrior Princess by Michael A. Stackpole et al.
• Requiem for a Rogue
• In the Empire's Service by Michael A. Stackpole et al.
• The Making of Baron Fel by Michael A. Stackpole et al.
• Family Ties by Michael A. Stackpole et al.
• Masquerade by Michael A. Stackpole et al.
• Mandatory Retirement by Michael A. Stackpole et al.

The following novels are sequels to the above stories, and are set from 6 years after the Battle of Yavin during the period of The New Republic, in chronological order:

• Rogue Squadron by Michael A. Stackpole
• Wedge's Gamble by Michael A. Stackpole
• The Krytos Trap by Michael A. Stackpole
• The Bacta War by Michael A. Stackpole
• Wraith Squadron by Aaron Allston
• Iron Fist by Aaron Allston
• Solo Command by Aaron Allston
• Isard's Revenge by Michael A. Stackpole
• Starfighters of Adumar by Aaron Allston