THE END OF INNOCENCE by Tyree Campbell

Swept up in the interstellar slave trade, Yoelin Thibbony decides to go after the hierarchs involved as well as rescue as many children as she can who have been captured and put to forced labor. Along the way, she moves step by step closer to the hierarch at the top of the trafficking chain. Her suspicions grow after she opens a camp to put slavers themselves to work, for what she learns through interrogations sickens her. But now she has to know for sure who is at the top, even though the knowledge could well ruin her life forever.