Bring It On - Laura Anne Gilman

The first rule of lonejacks is "don't get involved...."

Wren Valere just wants to do her job, collect a paycheck, and figure out her relationship with her business partner-turned-romantic partner, Sergei. No muss, no fuss, no outside entanglements. But when she takes on a job she shouldn't have, she finds herself once again in the cross-hairs of the Mage Council - and their aim is getting better.

Meanwhile, tensions between human Talents and the non-human residents of the city are escalating, putting one of her dearest friends in danger.

Her job, her people, and her city are at risk. And now, rather than her usual invisibility, everyone's looking at Wren to do something...

So much for never getting involved.