Hellfire – Chris Ryan

The story follows SAS Regiment hero Danny Black as he is deployed to Nigeria following the kidnapping of the British High Commissioner. Upon arrival, Black and his four-person team uncover a devastating plot. Terrorists have infected prisoners with a mysterious, deadly plague, revealing a joint Boko Haram and IS plan to unleash a global bio-terror attack. Black must race against a ticking clock to stop the outbreak and hunt down a mysterious, masked terrorist leader known only as the Caliph.