He is a New York Times Best-selling author & a former NAVY Seal. It's Jack Carr, who joined the show to promote his new book "The Devils Hand". Jack is a well-written & spoken author and in the book the plot deals with bio-logical warfare which is relevant to the ongoing pandemic and Jack also mentioned to the guys how he can find inspiration in his writing being a former soldier and finding a way to hook the reader while being believable as well.