Mark Greaney back on the program today. Mark is a New York Best Times bestselling author of international thrillers. He co-authored several Jack Ryan novels with Tom Clancy, and has recently concluded his involvement with the series, with his last solo effort being True Faith and Allegiance. Mark is also the author of the Gray Man series starring for CIA goon Court Gentry. Today, we'll talk about book six in that series, Gun Metal Gray.