Audio Mat Best is a former Army Ranger-turned- YouTube phenomenon and entrepreneur. And now, he's the best-selling author of the new brutally honest memoir, Thank You for My Service . Thank You for My Service recounts Best's experiences before, during and after his five combat tours in Afghanistan and Iraq — including the good, the bad, the ugly and the outright funny. An avid veteran advocate, Best also goes into explicit detail on the hardships he and so many others often face in transitioning back to civilian life after deployment. In this episode, Stratfor Chief Security Officer Fred Burton sits down with Best to discuss his new memoir, as well as his veteran-operated business, Black Rifle Coffee Company .