Go underground

For the map geeks among us comes a colorful new book with subway maps to 97 cities in the world. “Transit Maps of the World,� the heavily visual book by Londoner Mark Ovenden, groups the cities’ transit systems by zones and includes historical maps, logos and photos. It’s fascinating just to see the evolution of mass transit in urban areas but also useful to orient yourself to a transit system before you arrive. The book is published by Penguin with a $25 list price, but is available at Amazon.com for $16.50.