Racing the Clock — Vincent Berg

Alex seeks to find as many new followers as he can during the limited time he has left, as he comes to grip with the knowledge that his abilities will likely kill him. Before that happens, he hits the road with his sister and an ex-cop serving as a bodyguard. Along the way, they learn much more about him, about his followers, and about leading a mission when one doesn't know the way. He needs to connect with enough followers to build a whole new branch on the evolutionary tree, but he only has a limited amount of time to do it, and he has to stay below the radar as he does it.

This is the fourth of a six book series following Alex Jennings as he deals with a variety of challenges as he learns about what he's ultimately facing.