20 By Seventy

Philadelphia's head wonk, Seventy CEO David Thornburgh, runs down his list of indispensable nonfiction books that you should consider buying for the serious readers on your Christmas list. Along the way, he and host Chris Satullo discuss, among other things, gerrymandering, hopefulness,Robert Moses vs. Jane Jacobs, the Pittsburgh Penguins, purple skies, dead armadillos and what it's like to have your daughter turn you into a character in her novel.