Brimstone Cycle Series by Robert McKinney

Talk about one hell of a ride ... Robin is an arms smuggler with a bit of magic under her belt. When her secretary asks for a tank, she sets out to steal one and get paid. But how on earth can she get away clean when a jungle army patrol, band of rebels, and literal demons from hell all stand in her way? Find out in Hell on Wheels - a thrilling prelude to the thrilling Brimstone Hustle urban fantasy series!

Her deal with the devil cost more than she thought ... When her sister gets kidnapped, Robin, a smuggler who can jump through hell and land anywhere on earth, sets out to bring her back. But will she be able to find her family when a mercenary, an arms dealer, and a literal devil all stand in her way?