Darth Vader and the Lost Command 1

Star Wars: Darth Vader and the Lost Command 1 is the first issue of five in the Star Wars: Darth Vader and the Lost Command comic mini-series written by W. Haden Blackman.

Publisher's summary
Still haunted by the events in Revenge of the Sith, Darth Vader must set aside his past and put his future on hold for a mission to the mysterious Ghost Nebula to locate--and if possible, rescue--a missing Imperial expeditionary force.

But what seems a perfect opportunity to lose himself in his duty is complicated by two factors: he is paired with a willful yet highly competent co-commander, and the officer they are being sent to locate is the son of Vader’s rising nemesis, Moff Tarkin.