In this one-of-a-kind book, the complex and fascinating world of urban public transit is explored using five different characters' journeys through the imaginary city of Zoom. From the Zanies, a family of street performers; to Agent Theodore Rybka, a spy on a very secret mission; to Robbie, a seven-year-old boy visiting the city for the first time, the characters are quirky and full of personality. On this particular morning, they are all headed downtown...