What good is a library or a museum if you can't get to it? In this episode of the podcast, Constant Wonder introduces innovators who bring inspiration to people in the most unexpected ways. We learn about the inventor of the bookmobile, a feisty librarian who allowed neither bureaucrats nor train wrecks to interfere with her mobile library. Then we meet the curator of ATM-sized museums that are popping up in unusual places and opening the world to people who may not otherwise get to visit museums. And, finally, an artist who heads up a street mosaic project staffed by volunteers with mental illness. Their work appears in neglected alleyways and neighborhood parks. Guests: Sharlee Glenn, author of "Library on Wheels: Mary Lemist Titcomb and America's First Bookmobile" Charles Philipp, cofounder of MICRO, a distributed fleet of micro-museums Tessa Hunkin, mosaicist