Bill Griffith is best known for nearly 30 years of daily comic strips featuring the absurd, surreal American treasure known as Zippy the Pinhead, but he's also the author of the amazing new graphic memoir, Invisible Ink: My Mother's Love Affair With A Famous Cartoonist (Fantagraphics). This episode features a 2-part conversation about his new book, his history in underground comics, the birth of Zippy, and more! Part of our Cartoon Crossroads Columbus series of interviews.