Life After Theft Series by Aprilynne Pike

Moving to a new high school sucks. Especially a rich-kid private school. With uniforms. But nothing is worse than finding out the first girl you meet is dead. And a klepto. No one can see or hear Kimberlee except Jeff, so--in hopes of bringing an end to the snarkiest haunting in history--he agrees to help her complete her "unfinished business. " But when the enmity between Kimberlee and Jeff's new crush, Sera, manages to continue posthumously, Jeff wonders if he's made the right choice... moreMoving to a new high school sucks. Especially a rich-kid private school. With uniforms. But nothing is worse than finding out the first girl you meet is dead. And a klepto. No one can see or hear Kimberlee except Jeff, so--in hopes of bringing an end to the snarkiest haunting in history--he agrees to help her complete her "unfinished business. " But when the enmity between Kimberlee and Jeff's new crush, Sera, manages to continue posthumously, Jeff wonders if he's made the right choice. Clash meets sass in this uproarious modern-day retelling of Baroness Orczy's The Scarlet Pimpernel . less