Sorcery and Sandstorms - The Weaver's War, #3

A slave. A fire sorcerer. A grumpy cyborg. When an otherwise perfectly good night for drowning his sorrows is ruined by the fiery destruction of his living room, Flare Veritax is forced to accept not only sobriety, but the spine chilling realisation that his sister Arcana is in mortal danger. Desperate and a little singed, Flare bargains his way aboard Galactic Station as Sorcen's representative to the mighty Galactic Alliance, the last true bastion of safety in the war against the warg.
While he has no interest in politics itself, the Alliance has both information and influence which, if Flare can access it, may be the key to locating his sister. After surrendering his freedom to save the lives of his loved ones, Fenris languishes in chains on the primitive desert world of Hiraptha. All the while, Arcana's spirit floats in the custody of the Weaver, her continued survival dependant entirely on the other female's ability to keep her hidden from the ever-seeking Taelon. Before Flare can harness the strength of the Alliance, he must prove Sorcen's loyalty by locating a fleet of missing starships.
Thrown into partnership with a mysterious rogue and dogged by a murderous spy, he'll need every ounce of wit and magic he possesses if he's to successfully navigate the murky waters of intergalactic politics. Waking to the gut-wrenching news that Fenris is a slave, Arcana vows to do everything within her power to set him free. With her magic no more than a whisper in her veins and Caelum her only ally, locating the Guardian who holds her heart could prove more dangerous than it first appears - particularly when the Empress of Hiraptha wants Fenris for herself.