Warp Angel by Stuart Hopen
Newly revised and expanded edition. Interstellar flight has been outlawed -- the great warpships that traveled between systems were found to be damaging the very fabric of the universe. Isolated by the ban, the Draconian system has become decadent, strange -- and foul. Dominated by corporate guilds called "bods," Draconian society has built its economy on slavery and assassination. A former assassin, Magen, has rebelled. When her husband is taken by slavers, she sets out to do whatever it takes to get him back -- even if it means destroying the entire Draconian civilization!