WNYC reporter Ilya Marritz is filling in today for Leonard.
Singer, musician and songwriter Chris Thile on his new gig, hosting "A Prairie Home Companion." Dan Ackerman tells us the history behind the notoriously addictive game in The Tetris Effect: The Game the Hypnotized the World. Francine Prose talks about her new novel, Mister Monkey. Sebastian Mallaby discusses his in-depth biography of Alan Greenspan called, The Man Who Knew: The Life and Times of Alan Greenspan.