"This is writing with the brakes off and the adrenaline pumped to high" - Liz Holiday, SCI-FI NOW"... a cracking thriller which achieves the tricky sci-fi balancing act ... feeling relevant and accessible" - Amazon ReviewerOne hundred years from now, against all odds, Earth has found a new stability; the political order has reached a tentative balance, and the new colony on Mars is growing. But the fraught years of the 21st century have left an uneasy legacy ...As genetically engineered alpha males, Thirteens were designed to be the ultimate military fighting force but, with no wars to fight, they find themselves surplus to requirements. Many of the Thirteens have left for Mars, but now one has returned, killing everyone on the shuttle on which he arrived.Only Carl Marsalis, one of the Thirteen, can hunt him down. So begins a frantic manhunt, a battle of survival, and a search for the truth about what was really done with the world's last soldiers.THIRTEEN (previously published as BLACK MAN) is an unstoppable SF thriller about the ramifications of playing with genetic blueprints. It is also a novel about prejudice, and the human capacity for violence, deceit and corruption.