In My TBR Stack:

Into a Dark Frontier
by John Mangan
Oceanview Books
Hardcover

From the publisher's website:

In the near future, Africa collapses into an enormous failed state, leaving the continent lawless and severely depopulated. For most, the breakdown brings horror, but for others—the outcast, the desperate, the criminals, and the insane—it allows unparalleled opportunity: a new frontier of danger and unlimited possibility.

In America, ex-Navy SEAL Slade Crawford, emotionally crippled after twenty years of frontline combat, the dissolution of his marriage, and the accidental death of his son, is falsely accused of terrorism. Slade flees to Africa to build a new life and escape his past when he is captured by an enigmatic American colonel, Gary Kraven, and blackmailed into tracking down a blood cult that is rampaging across the sub-Sahara. Struggling to stay alive and to free himself from Kraven’s grasp, Slade pursues the cult across the lawless African frontier. He soon learns that nothing is as it seems and that he is standing at the epicenter of a global struggle that will determine the course of history. Slade must decide whether to fight for his life or his honor—he can’t have both.