We talked to Mark about his latest novel in the Gray Man series, "Mission Critical," and it sure looks like another outstanding page-turner.

We talked with Mark Greaney last year, just as he released the best-selling Gray Man novel "Agent in Place."

Well, Mark's been hard at it since then, and this morning he joined us to talk about "Mission Critical," how he writes, when the Gray Man series might be made into a movie or TV series, and who he'd like to see as the world's most dangerous assassin, Courtland Gentry:

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