Our guest is the writer Peter Heller, whose new novel, "The River," has been named an Amazon Best Book of March 2019. It's a fast-paced, thoughtful thriller about two friends on a river excursion in northern Canada. And per The Denver Post: "A fiery tour de force [of] poetic, staccato sentences and masterfully crafted prose.... The story itself resembles a trip down a river -- some parts are peaceful and allow for quiet introspection and big, deep breaths. But then you hit the rapids and the danger and risk jump off the page, forcing a sense of urgency.