Popular science author Mary Roach discusses her new book, 'Grunt: The Curious Science of Humans at War.' The author says, "Military science doesn't get much exposure. It falls through the cracks."

PW Radio host Rose Fox says, "Mary Roach was amazing and if you ever have the chance to interview her or just hang out with her, say yes."

Then, in the final segment of this week's PW Radio show, Publishers Weekly bookselling editor Judith Rosen previews this year's ABC Children’s Institute.