Scott Kelly is the American who has spent the longest amount of time in space and this week, he's on Fully Booked talking about what life up there is like and about writing his new memoir, ENDURANCE. We talk to another American hero, Khizr Khan, whose new book, AN AMERICAN FAMILY, offers insight into what it was like for Khan to become a star at the Democratic National Convention. And our editors stop by to give you their thoughts about this week's bestsellers!