Katana Series by Cole Gibsen

Skater girl or supernatural samurai? Rileigh Martin wants to believe that adrenaline gave her the strength to fend off three muggers in the mall parking lot. But adrenaline doesn't explain the voice in her head giving her battle tips and warnings. While worrying that she's going crazy (always a reputation ruiner), Rileigh gets a visit from Kim, a handsome martial arts instructor, who tells Rileigh she's harboring the spirit of a five-hundred-year-old samurai warrior... moreSkater girl or supernatural samurai? Rileigh Martin wants to believe that adrenaline gave her the strength to fend off three muggers in the mall parking lot. But adrenaline doesn't explain the voice in her head giving her battle tips and warnings. While worrying that she's going crazy (always a reputation ruiner), Rileigh gets a visit from Kim, a handsome martial arts instructor, who tells Rileigh she's harboring the spirit of a five-hundred-year-old samurai warrior. Relentlessly attacked by ninjas, Rileigh has no choice but to master the katana--a deadly Japanese sword that's also the key to her past. As the spirit grows stronger and her feelings for Kim intensify, Rileigh is torn between continuing as the girl she's always been and embracing the warrior inside her. Praise: "An action-packed page-turner."--Booklist less

Is Rileigh’s only hope for salvation to team up with her sworn enemy? Rileigh Martin just wants to do normal teenage things, like go on romantic dates with Kim, her boyfriend and past life soul mate. Although that seems impossible when she’s the reincarnation of Senshi, a fifteenth century samurai warrior. After a ninja ambush leaves her unable to control her ki powers, Rileigh vows to get them under control before her friends lose more than their eyebrows... moreIs Rileigh’s only hope for salvation to team up with her sworn enemy? Rileigh Martin just wants to do normal teenage things, like go on romantic dates with Kim, her boyfriend and past life soul mate. Although that seems impossible when she’s the reincarnation of Senshi, a fifteenth century samurai warrior. After a ninja ambush leaves her unable to control her ki powers, Rileigh vows to get them under control before her friends lose more than their eyebrows. But when Kim leaves her for his past life betrothed and the other samurai stop talking to her, Rileigh realizes she doesn’t have any friends left to worry about. As the ninja attacks increase, Rileigh learns that the reincarnated kunoichi, a powerful female ninja, wants to kill her in order to reclaim her destructive powers. Alone and with increasingly unstable powers, Rileigh’s only offer of help comes from Whitley, her sworn past life enemy. Rileigh knows she doesn’t stand a chance against the kunoichi by herself, but Whitley’s sudden allegiance might be hiding a much deadlier agenda. less