The War Enders Apprentice — Elizabeth Guizzetti

In the chaotic universe, many intelligent species are on the brink of war, but the Guild holds the violence at bay to foster peaceful trade. The most renowned War Ender is Lady Alana of House Eyreid, who hopes to train her beloved nephew, Roark, in her vocation. It was supposed to be a simple training mission aboard an Interrealm slave ship. However, when Alana finds her people enslaved, she murders the crew and rescues every slave -- whether criminal, dishonored, or stolen. A fleeting vision of Roark's future compels her to offer the newly freed Eohan a War Ender's education.  For her vision to come true, Alana must rescue Eohan's young brother who was sold in the last port and lost somewhere in the Realms, but first, they have a war to end.