The Last Terminal Entity - The Pulse, #1

Terminal Entity 55 is the last nanoinfused human, the last person capable of time travel. After learning her family was among the millions slaughtered by rebel factions, TE-55 volunteers to travel 100 years into the past to rescue civilization from its dystopian future. Her mission will be her revenge, even as it condemns her to only one more year of life. Hours before her jump, an anomaly in the information archives shakes her confidence in her mission.
When she arrives in 2018 Chicago, a shadowy organization leaves her unable to tell friend from foe. Time becomes her enemy when she discovers her mission was a lie.