Earthrise — M.C.A. Hogarth

Reese Eddings has enough to do just keeping her rattletrap merchant vessel, the TMS Earthrise, profitable enough to pay food for herself and her micro-crew. So when a mysterious benefactor from her past shows up demanding she rescue a man from slavers, her first reaction is to say “NO!” And then to remember that she sort of promised to repay the loan. But she doesn't remember signing up to tangle with pirates and slavers over a space elf prince... Book 1 of the Her Instruments trilogy is a rollicking space operatic adventure set in the Pelted Paradox universe.