Code Red (Mitch Rapp 22) by Vince Flynn

THE NEW PULSE-POUNDING THRILLER IN THE NEW YORK TIMES BESTSELLING MITCH RAPP SERIES
Mitch Rapp owes powerful criminal Damian Losa a favour, and it’s being called in. With no choice other than to honour his agreement, Rapp heads to Syria to stop a new designer drug spreading into Losa’s territory. When he discovers the true culprit – someone with far bigger goals than just Syria – the scale of his mission grows.
But Rapp and his team are operating in an incredibly volatile country where the US has few assets and allegiances shift almost daily. And just one false move would set off an international confrontation that could easily spin out of control and rewrite the world order . . .