In reading order
Asbaran Solutions
Chris Kennedy
Winged Hussars
Mark Wandrey
The Golden Horde
Chris Kennedy
A Fistful of Credits: Stories from the Four Horsemen Universe
Chris Kennedy, Kevin Ikenberry, Jason Cordova, Mark Wandrey, Terry Mixon
Peacemaker
Kevin Ikenberry
For a Few Credits More: More Stories from the Four Horsemen Universe
Chris Kennedy, Kacey Ezell - editor, Peter Cawdron, Rob Howell, Scott Moon, Josh Hayes, JR Handley, Corey Truax, Tim C. Taylor, Mark Wandrey, Terry Mixon, Thomas A. Mays, Ian J. Malone, Jake Bible
The Good, the Bad, and the Merc
Chris Kennedy, Marisa Wolf, Jon R. Osborne, Kacey Ezell - editor, Jason Cordova, Mark Wandrey, Terry Mixon, Robert E. Hampson, Terry Maggert, Christopher L. Smith, Philip Wohlrab, Stephanie Osborn, Kal Spriggs, T. Allen Diaz, Eric S. Brown
CASPer Alamo
Eric S. Brown, Jason Brannon
Alpha Contracts
Chris Kennedy, Mark Wandrey
Assassin
Marisa Wolf, Kacey Ezell - editor
Honor the Threat
Kevin Ikenberry
Cartwright's Cavaliers
Mark Wandrey
Authors
Chris Kennedy Christopher L. Smith Corey Truax Eric S. Brown Ian J. Malone Jake Bible Jason Brannon Jason Cordova Jon R. Osborne Josh Hayes JR Handley Kacey Ezell - editor Kal Spriggs Kevin Ikenberry Marisa Wolf Mark Wandrey Peter Cawdron Philip Wohlrab Rob Howell Robert E. Hampson Scott Moon Stephanie Osborn T. Allen Diaz Terry Maggert Terry Mixon Thomas A. Mays Tim C. Taylor