the height of their popularity in the mid-twentieth century. In England, bookmobiles, or "traveling libraries" as they were called in that country, were typically used in rural and outlying areas. However, during World War II, one traveling library found popularity in the city of London. Because of air raids and blackouts, patrons did not visit the Metropolitan Borough of Saint Pancras's physical libraries as much as before the war. To meet the needs of its citizens, the borough borrowed a traveling library van from Hastings and in 1941 created a "war-time library on wheels." (The Saint Pancras borough was abolished in 1965 and became part of the London Borough of Camden.) The Saint Pancras traveling library consisted of a van mounted on a six-wheel chassis powered by a Ford engine. The traveling library could carry more than 2,000 books on open-access shelves that ran the length of the van. The books were arranged in Dewey order, and up to 20 patrons could fit into the van at one time to browse and check out materials. A staff enclosure was at the rear of the van, and the van was lighted with windows in the roof – each fitted with black-out curtains in case of a German bombing raid. The van could even be used at night, as it was fitted with electric roof lamps that could access electrical current from a nearby lamp-standard or civil defense post. The traveling library had a selection of fiction and non-fiction works; it even had a children's section with fairy tales and non-fiction books for kids. The mayor of the borough christened the van with a speech, saying that "People without books are like houses without windows." Even after heavy night bombings by the Germans, readers visited the Saint Pancras Traveling Library in some of the worst bombed areas. 21st century Bookmobiles are still in use in the 21st century, operated by libraries, schools, activists, and other organizations. Although some feel that the bookmobile is an outmoded service, citing reasons like high costs, advanced technology, impracticality, and ineffectiveness, others cite the ability of the bookmobile to be more cost-efficient than building more branch libraries would be and its high use among its patrons as support for its continuation. To meet the growing demand for "greener" bookmobiles that deliver outreach services to their patrons, some bookmobile manufacturers have introduced significant advances to reduce their carbon