Vortex Tempest 2 - Julie Cross, Macmillan

This is the first book in an exciting new trilogy - ",The Time Traveller's Wife", meets ",The Matrix",. Jackson Meyer has thrown himself into his role as an agent for Tempest, the shadowy division of the CIA that handles all time-travel-related threats. Despite his heartbreak at losing the love of his life, Jackson has proved himself to be an excellent agent. However, all that changes when Holly - the girl he altered history to save - re-enters his life. And when Eyewall, an opposing division of the CIA, emerges, Jackson and his fellow agents find themselves under attack and on the run. Jackson must decide between saving the love of his life and the entire world...