Time Hunter (Book 2 - Jump Line series)
Time Hunter is the second book in the Jump Line series: https://www.wattpad.com/story/31885460-jump-line.
Esa James is human, but she's got a unique set of capabilities that make her special and wanted. She's part of an elite unit of five soldiers in the year 2105 who are able to easily travel through time thanks to the Jump Line.
Esa's former teammate turned traitor, Luther, still hasn't been found. Neither has the evil leader of NorthStar, Troy.
Strange things begin to happen to each of the team members. The elite team of Esa, Theo, Samuel, Audrina and Gave know it's only a matter of time before Luther and Troy strike and try to capture the entire team, but in the meantime, someone or something is hunting them and trying to pick them off one by one. Esa is on the search for the Hunter before she becomes its next victim.